Concept-wise Practice

common mistake MCQ Questions for Class 10

common mistake se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

Practice Questions

91 questions tagged with common mistake.

एक छात्र ने (6x+5y=60) के लिए ((10,0)), ((0,12)) और ((5,6)) चुने। कौन सा कथन सही है?

A student chose ((10,0)), ((0,12)), and ((5,6)) for (6x+5y=60). Which statement is correct?

Explanation opens after your attempt
Correct Answer

B. केवल ((10,0)) और ((0,12)) रेखा पर हैंOnly ((10,0)) and ((0,12)) lie on the line

Step 1

Concept

((10,0)) and ((0,12)) satisfy the equation, but ((5,6)) does not give (60). Check points before drawing the graph.

Step 2

Why this answer is correct

The correct answer is B. केवल ((10,0)) और ((0,12)) रेखा पर हैं / Only ((10,0)) and ((0,12)) lie on the line. ((10,0)) and ((0,12)) satisfy the equation, but ((5,6)) does not give (60). Check points before drawing the graph.

Step 3

Exam Tip

((10,0)) और ((0,12)) समीकरण को संतुष्ट करते हैं, लेकिन ((5,6)) देने पर (60) नहीं मिलता। ग्राफ बनाने से पहले बिंदुओं की जांच करें।

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एक छात्र ने (4x+3y=24) की रेखा के लिए ((6,0)), ((0,8)) और ((3,4)) लिए। कौन सा कथन सही है?

A student chose ((6,0)), ((0,8)), and ((3,4)) for the line (4x+3y=24). Which statement is correct?

Explanation opens after your attempt
Correct Answer

B. केवल ((6,0)) और ((0,8)) रेखा पर हैंOnly ((6,0)) and ((0,8)) lie on the line

Step 1

Concept

((6,0)) and ((0,8)) satisfy the equation, but ((3,4)) does not give (24). Check points before plotting the graph.

Step 2

Why this answer is correct

The correct answer is B. केवल ((6,0)) और ((0,8)) रेखा पर हैं / Only ((6,0)) and ((0,8)) lie on the line. ((6,0)) and ((0,8)) satisfy the equation, but ((3,4)) does not give (24). Check points before plotting the graph.

Step 3

Exam Tip

((6,0)) और ((0,8)) समीकरण को संतुष्ट करते हैं, लेकिन ((3,4)) देने पर (24) नहीं मिलता। ग्राफ से पहले बिंदुओं की जांच करें।

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यदि रेखा (2x+5y=20) को ग्राफ करना है, तो कौन सा बिंदु गलत चुना गया है?

If the line (2x+5y=20) is to be graphed, which point is chosen incorrectly?

Explanation opens after your attempt
Correct Answer

D. ((2,5))

Step 1

Concept

Substituting ((2,5)) gives \(2\cdot2+5\cdot5=29\), not (20). Every chosen plotting point must satisfy the equation.

Step 2

Why this answer is correct

The correct answer is D. ((2,5)). Substituting ((2,5)) gives \(2\cdot2+5\cdot5=29\), not (20). Every chosen plotting point must satisfy the equation.

Step 3

Exam Tip

((2,5)) रखने पर \(2\cdot2+5\cdot5=29\), जो (20) नहीं है। ग्राफ के लिए हर चुना बिंदु समीकरण को संतुष्ट करना चाहिए।

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एक छात्र ने (3x+4y=12) को ग्राफ करने के लिए ((4,0)) और ((0,3)) बिंदु लिए। यह चयन कैसा है?

A student chose ((4,0)) and ((0,3)) to graph (3x+4y=12). How is this choice?

Explanation opens after your attempt
Correct Answer

A. सहीCorrect

Step 1

Concept

Both ((4,0)) and ((0,3)) satisfy (3x+4y=12). Two correct points are enough to draw a line.

Step 2

Why this answer is correct

The correct answer is A. सही / Correct. Both ((4,0)) and ((0,3)) satisfy (3x+4y=12). Two correct points are enough to draw a line.

Step 3

Exam Tip

((4,0)) और ((0,3)) दोनों समीकरण (3x+4y=12) को संतुष्ट करते हैं। ग्राफ बनाते समय दो सही बिंदु पर्याप्त होते हैं।

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यदि ग्राफ पर (\left\(7,-3\right\)) को गलती से (\left\(-3,7\right\)) पढ़ लिया जाए, तो गलती किस प्रकार की है?

If (\left\(7,-3\right\)) is mistakenly read as (\left\(-3,7\right\)) on a graph, what type of mistake is it?

Explanation opens after your attempt
Correct Answer

A. चिह्न और निर्देशांक क्रम की गलतीError of sign and coordinate order

Step 1

Concept

In (\left\(7,-3\right\)), (x=7) and (y=-3). Reversing coordinates and changing sign makes the answer wrong.

Step 2

Why this answer is correct

The correct answer is A. चिह्न और निर्देशांक क्रम की गलती / Error of sign and coordinate order. In (\left\(7,-3\right\)), (x=7) and (y=-3). Reversing coordinates and changing sign makes the answer wrong.

Step 3

Exam Tip

बिंदु (\left\(7,-3\right\)) में (x=7) और (y=-3) है। निर्देशांक उलटने और चिह्न बदलने से उत्तर गलत हो जाता है।

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यदि ग्राफ पर (\left\(6,-2\right\)) को गलती से (\left\(-2,6\right\)) पढ़ लिया जाए, तो गलती किस प्रकार की है?

If (\left\(6,-2\right\)) is mistakenly read as (\left\(-2,6\right\)) on a graph, what type of mistake is it?

Explanation opens after your attempt
Correct Answer

A. चिह्न और निर्देशांक क्रम की गलतीError of sign and coordinate order

Step 1

Concept

In (\left\(6,-2\right\)), (x=6) and (y=-2). Reversing coordinates and changing sign makes the answer wrong.

Step 2

Why this answer is correct

The correct answer is A. चिह्न और निर्देशांक क्रम की गलती / Error of sign and coordinate order. In (\left\(6,-2\right\)), (x=6) and (y=-2). Reversing coordinates and changing sign makes the answer wrong.

Step 3

Exam Tip

बिंदु (\left\(6,-2\right\)) में (x=6) और (y=-2) है। निर्देशांक उलटने से और चिह्न बदलने से उत्तर गलत हो जाता है।

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एक विद्यार्थी (2x+3y=12) और (4x+6y=24) के लिए केवल एक हल लिखता है। गलती क्या है?

A student writes only one solution for (2x+3y=12) and (4x+6y=24). What is the mistake?

Explanation opens after your attempt
Correct Answer

B. संपाती रेखाओं को एक हल वाला माननाTreating coincident lines as having one solution

Step 1

Concept

The second equation is (2) times the first, so the lines are coincident. Coincident lines have infinitely many solutions.

Step 2

Why this answer is correct

The correct answer is B. संपाती रेखाओं को एक हल वाला मानना / Treating coincident lines as having one solution. The second equation is (2) times the first, so the lines are coincident. Coincident lines have infinitely many solutions.

Step 3

Exam Tip

दूसरा समीकरण पहले का (2) गुना है, इसलिए रेखाएँ संपाती हैं। संपाती रेखाओं के अनंत हल होते हैं।

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यदि कोई विद्यार्थी प्रतिच्छेद बिंदु (\left\(7,2\right\)) को (\left\(2,7\right\)) लिखता है, तो मुख्य गलती क्या है?

If a student writes the intersection point (\left\(7,2\right\)) as (\left\(2,7\right\)), what is the main mistake?

Explanation opens after your attempt
Correct Answer

B. निर्देशांक उलटे लिखनाWriting coordinates in reverse order

Step 1

Concept

A point is always written in (\left\(x,y\right\)) order. Reversing coordinates makes the solution wrong.

Step 2

Why this answer is correct

The correct answer is B. निर्देशांक उलटे लिखना / Writing coordinates in reverse order. A point is always written in (\left\(x,y\right\)) order. Reversing coordinates makes the solution wrong.

Step 3

Exam Tip

बिंदु हमेशा (\left\(x,y\right\)) क्रम में लिखा जाता है। निर्देशांक उलटे करने से हल गलत हो जाता है।

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किस स्थिति में ग्राफीय विधि से हल अनुमानित पढ़ने में अधिक सावधानी चाहिए?

In which situation should more care be taken while reading a solution approximately in graphical method?

Explanation opens after your attempt
Correct Answer

C. जब प्रतिच्छेद बिंदु भिन्न या दशमलव निर्देशांक पर होWhen the intersection point has fractional or decimal coordinates

Step 1

Concept

Small errors can occur while reading fractional or decimal coordinates from a graph. Keep the scale clear and read the point carefully.

Step 2

Why this answer is correct

The correct answer is C. जब प्रतिच्छेद बिंदु भिन्न या दशमलव निर्देशांक पर हो / When the intersection point has fractional or decimal coordinates. Small errors can occur while reading fractional or decimal coordinates from a graph. Keep the scale clear and read the point carefully.

Step 3

Exam Tip

भिन्न या दशमलव निर्देशांक ग्राफ से पढ़ते समय छोटी गलती हो सकती है। पैमाना साफ रखें और बिंदु को सावधानी से पढ़ें।

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एक विद्यार्थी (2x+4y=16) और (x+2y=8) के लिए केवल (1) हल लिखता है। गलती क्या है?

A student writes only (1) solution for (2x+4y=16) and (x+2y=8). What is the mistake?

Explanation opens after your attempt
Correct Answer

B. संपाती रेखाओं को एक हल वाला माननाTreating coincident lines as having one solution

Step 1

Concept

The first equation is (2) times the second, so the lines are coincident. Coincident lines have infinitely many solutions.

Step 2

Why this answer is correct

The correct answer is B. संपाती रेखाओं को एक हल वाला मानना / Treating coincident lines as having one solution. The first equation is (2) times the second, so the lines are coincident. Coincident lines have infinitely many solutions.

Step 3

Exam Tip

पहला समीकरण दूसरे का (2) गुना है, इसलिए रेखाएँ संपाती हैं। संपाती रेखाओं के अनंत हल होते हैं।

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एक विद्यार्थी (3x+2y=12) और (6x+4y=24) के लिए केवल (1) हल लिखता है। उसकी गलती क्या है?

A student writes only (1) solution for (3x+2y=12) and (6x+4y=24). What is the mistake?

Explanation opens after your attempt
Correct Answer

B. संपाती रेखाओं को एक हल वाला माननाTreating coincident lines as having one solution

Step 1

Concept

The second equation is (2) times the first, so the lines are coincident. Coincident lines have infinitely many solutions.

Step 2

Why this answer is correct

The correct answer is B. संपाती रेखाओं को एक हल वाला मानना / Treating coincident lines as having one solution. The second equation is (2) times the first, so the lines are coincident. Coincident lines have infinitely many solutions.

Step 3

Exam Tip

दूसरा समीकरण पहले का (2) गुना है, इसलिए रेखाएँ संपाती हैं। संपाती रेखाओं के अनंत हल होते हैं।

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रेखाएँ (2x+3y=12) और (4x+6y=24) के ग्राफ पर कोई विद्यार्थी केवल एक प्रतिच्छेद बिंदु लिखता है। गलती क्या है?

A student writes only one intersection point for the graphs of (2x+3y=12) and (4x+6y=24). What is the mistake?

Explanation opens after your attempt
Correct Answer

B. संपाती रेखाओं को एक हल वाला माननाTreating coincident lines as having one solution

Step 1

Concept

The second equation is (2) times the first, so the lines are coincident. Coincident lines have infinitely many solutions, not only (1).

Step 2

Why this answer is correct

The correct answer is B. संपाती रेखाओं को एक हल वाला मानना / Treating coincident lines as having one solution. The second equation is (2) times the first, so the lines are coincident. Coincident lines have infinitely many solutions, not only (1).

Step 3

Exam Tip

दूसरा समीकरण पहले का (2) गुना है, इसलिए रेखाएँ संपाती हैं। संपाती रेखाओं के अनंत हल होते हैं, केवल (1) नहीं।

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यदि विद्यार्थी ( (9,4) ) को ( (4,9) ) लिख देता है, तो मुख्य गलती क्या है?

If a student writes ( (9,4) ) as ( (4,9) ), what is the main mistake?

Explanation opens after your attempt
Correct Answer

B. निर्देशांक उलटे लिखनाWriting coordinates in reverse order

Step 1

Concept

A point is always written in ( (x,y) ) order. Reversing coordinates can make the solution wrong.

Step 2

Why this answer is correct

The correct answer is B. निर्देशांक उलटे लिखना / Writing coordinates in reverse order. A point is always written in ( (x,y) ) order. Reversing coordinates can make the solution wrong.

Step 3

Exam Tip

बिंदु हमेशा ( (x,y) ) क्रम में लिखा जाता है। निर्देशांक उलटे लिखने से हल गलत हो सकता है।

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ग्राफीय विधि में पैमाना गलत लेने से सबसे पहले किसमें गलती हो सकती है?

In graphical method, taking a wrong scale can first cause an error in what?

Explanation opens after your attempt
Correct Answer

A. बिंदुओं को सही स्थान पर लगाने मेंPlotting points at correct positions

Step 1

Concept

A wrong scale can make point positions incorrect. So choose a clear scale before drawing the graph.

Step 2

Why this answer is correct

The correct answer is A. बिंदुओं को सही स्थान पर लगाने में / Plotting points at correct positions. A wrong scale can make point positions incorrect. So choose a clear scale before drawing the graph.

Step 3

Exam Tip

गलत पैमाना बिंदुओं की स्थिति गलत कर सकता है। इसलिए ग्राफ बनाने से पहले स्पष्ट पैमाना चुनें।

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यदि एक विद्यार्थी ( (5,3) ) को ( (3,5) ) पढ़ता है, तो गलती क्या है?

If a student reads ( (5,3) ) as ( (3,5) ), what is the mistake?

Explanation opens after your attempt
Correct Answer

B. निर्देशांक उलटे पढ़नाReading coordinates in reverse order

Step 1

Concept

A point is read in ( (x,y) ) order. Reversing the coordinates makes the solution wrong.

Step 2

Why this answer is correct

The correct answer is B. निर्देशांक उलटे पढ़ना / Reading coordinates in reverse order. A point is read in ( (x,y) ) order. Reversing the coordinates makes the solution wrong.

Step 3

Exam Tip

बिंदु ( (x,y) ) क्रम में पढ़ा जाता है। निर्देशांक उलटे करने से हल गलत हो जाता है।

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ग्राफीय विधि में पैमाना चुनते समय कौन-सी बात सही है?

Which statement is correct while choosing scale in graphical method?

Explanation opens after your attempt
Correct Answer

B. पैमाना इतना स्पष्ट हो कि बिंदु सही अंकित होंThe scale should be clear enough to plot points correctly

Step 1

Concept

A clear scale helps plot points at the correct places. A wrong scale can cause mistakes in reading the intersection point.

Step 2

Why this answer is correct

The correct answer is B. पैमाना इतना स्पष्ट हो कि बिंदु सही अंकित हों / The scale should be clear enough to plot points correctly. A clear scale helps plot points at the correct places. A wrong scale can cause mistakes in reading the intersection point.

Step 3

Exam Tip

स्पष्ट पैमाना लेने से बिंदु सही जगह लगते हैं। गलत पैमाना प्रतिच्छेद बिंदु पढ़ने में गलती करा सकता है।

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ग्राफीय विधि में कौन-सी गलती सबसे सामान्य है?

Which mistake is most common in graphical method?

Explanation opens after your attempt
Correct Answer

A. प्रतिच्छेद बिंदु के (x) और (y) निर्देशांक उलटे पढ़नाReading the (x) and (y) coordinates of intersection in reverse order

Step 1

Concept

The solution must be read in ( (x,y) ) order, and reversing it changes the answer. In exams, write the intersection point carefully.

Step 2

Why this answer is correct

The correct answer is A. प्रतिच्छेद बिंदु के (x) और (y) निर्देशांक उलटे पढ़ना / Reading the (x) and (y) coordinates of intersection in reverse order. The solution must be read in ( (x,y) ) order, and reversing it changes the answer. In exams, write the intersection point carefully.

Step 3

Exam Tip

हल को ( (x,y) ) क्रम में पढ़ना चाहिए, उल्टा पढ़ने पर उत्तर बदल जाता है। परीक्षा में प्रतिच्छेद बिंदु को ध्यान से लिखें।

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संख्या रेखा पर \( \sqrt{29}+\sqrt{29}+\sqrt{29}+\sqrt{29} \) का सरल रूप कौन सा है?

What is the simplified form of \( \sqrt{29}+\sqrt{29}+\sqrt{29}+\sqrt{29} \) on the number line?

Explanation opens after your attempt
Correct Answer

B. \(4\sqrt{29}\)

Step 1

Concept

Adding like radicals gives \( \sqrt{29}+\sqrt{29}+\sqrt{29}+\sqrt{29}=4\sqrt{29} \). Do not add the numbers inside radicals directly.

Step 2

Why this answer is correct

The correct answer is B. \(4\sqrt{29}\). Adding like radicals gives \( \sqrt{29}+\sqrt{29}+\sqrt{29}+\sqrt{29}=4\sqrt{29} \). Do not add the numbers inside radicals directly.

Step 3

Exam Tip

समान मूलों को जोड़ने पर \( \sqrt{29}+\sqrt{29}+\sqrt{29}+\sqrt{29}=4\sqrt{29} \) होता है। मूल के अंदर संख्याएँ सीधे नहीं जोड़ी जातीं।

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संख्या रेखा पर \( \sqrt{19}+\sqrt{19}+\sqrt{19} \) का सरल रूप कौन सा है?

What is the simplified form of \( \sqrt{19}+\sqrt{19}+\sqrt{19} \) on the number line?

Explanation opens after your attempt
Correct Answer

B. \(3\sqrt{19}\)

Step 1

Concept

Adding like radicals gives \( \sqrt{19}+\sqrt{19}+\sqrt{19}=3\sqrt{19} \). Do not add the numbers inside radicals directly.

Step 2

Why this answer is correct

The correct answer is B. \(3\sqrt{19}\). Adding like radicals gives \( \sqrt{19}+\sqrt{19}+\sqrt{19}=3\sqrt{19} \). Do not add the numbers inside radicals directly.

Step 3

Exam Tip

समान मूलों को जोड़ने पर \( \sqrt{19}+\sqrt{19}+\sqrt{19}=3\sqrt{19} \) होता है। मूल के अंदर संख्याएँ सीधे नहीं जोड़ी जातीं।

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संख्या रेखा पर \( \sqrt{13}+\sqrt{13} \) का सरल रूप कौन सा है?

What is the simplified form of \( \sqrt{13}+\sqrt{13} \) on the number line?

Explanation opens after your attempt
Correct Answer

A. \(2\sqrt{13}\)

Step 1

Concept

Adding like radicals gives \( \sqrt{13}+\sqrt{13}=2\sqrt{13} \). Do not add the numbers inside the radicals directly.

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{13}\). Adding like radicals gives \( \sqrt{13}+\sqrt{13}=2\sqrt{13} \). Do not add the numbers inside the radicals directly.

Step 3

Exam Tip

समान मूलों को जोड़ने पर \( \sqrt{13}+\sqrt{13}=2\sqrt{13} \) होता है। मूल के अंदर संख्याएँ सीधे नहीं जोड़ी जातीं।

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संख्या रेखा पर \(\sqrt{24}\) के बारे में कौन सा कथन गलत है?

Which statement about \(\sqrt{24}\) on the number line is false?

Explanation opens after your attempt
Correct Answer

D. \(\sqrt{24}=24\)

Step 1

Concept

Since \(4^2<24<5^2\), \(\sqrt{24}\) is between (4) and (5) and is not equal to (24). Do not treat a square root as the original number.

Step 2

Why this answer is correct

The correct answer is D. \(\sqrt{24}=24\). Since \(4^2<24<5^2\), \(\sqrt{24}\) is between (4) and (5) and is not equal to (24). Do not treat a square root as the original number.

Step 3

Exam Tip

क्योंकि \(4^2<24<5^2\), इसलिए \(\sqrt{24}\) (4) और (5) के बीच है और (24) के बराबर नहीं है। वर्गमूल को मूल संख्या न मानें।

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एक छात्र ने कहा कि \(\sqrt{12}\) संख्या रेखा पर (12) के पास होगा। सही सुधार क्या है?

A student said that \(\sqrt{12}\) will be near (12) on the number line. What is the correct correction?

Explanation opens after your attempt
Correct Answer

C. यह (3) और (4) के बीच होगाIt will be between (3) and (4)

Step 1

Concept

Since \(3^2<12<4^2\), \(\sqrt{12}\) lies between (3) and (4). A square root can be much smaller than the number.

Step 2

Why this answer is correct

The correct answer is C. यह (3) और (4) के बीच होगा / It will be between (3) and (4). Since \(3^2<12<4^2\), \(\sqrt{12}\) lies between (3) and (4). A square root can be much smaller than the number.

Step 3

Exam Tip

क्योंकि \(3^2<12<4^2\), इसलिए \(\sqrt{12}\) (3) और (4) के बीच है। वर्गमूल संख्या को छोटा कर सकता है।

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संख्या रेखा पर \(\sqrt{a^2}\) के लिए यदि (a=-4) हो तो बिंदु कौन सा होगा?

For \(\sqrt{a^2}\) on the number line, if (a=-4), which point will it be?

Explanation opens after your attempt
Correct Answer

B. (4)

Step 1

Concept

\(\sqrt{a^2}=|a|\), so for (a=-4) the value is (4). The principal square root is not negative.

Step 2

Why this answer is correct

The correct answer is B. (4). \(\sqrt{a^2}=|a|\), so for (a=-4) the value is (4). The principal square root is not negative.

Step 3

Exam Tip

\(\sqrt{a^2}=|a|\), इसलिए (a=-4) पर मान (4) होगा। वर्गमूल का मुख्य मान ऋणात्मक नहीं होता।

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संख्या रेखा पर \(\sqrt{7}\) की स्थिति के बारे में कौन सा कथन सही है?

Which statement about the position of \(\sqrt{7}\) on the number line is correct?

Explanation opens after your attempt
Correct Answer

B. यह (2) और (3) के बीच हैIt is between (2) and (3)

Step 1

Concept

Since \(2^2<7<3^2\), \(\sqrt{7}\) lies between (2) and (3). Taking \(\sqrt{7}\) as (7) is a common mistake.

Step 2

Why this answer is correct

The correct answer is B. यह (2) और (3) के बीच है / It is between (2) and (3). Since \(2^2<7<3^2\), \(\sqrt{7}\) lies between (2) and (3). Taking \(\sqrt{7}\) as (7) is a common mistake.

Step 3

Exam Tip

क्योंकि \(2^2<7<3^2\), इसलिए \(\sqrt{7}\), (2) और (3) के बीच होगा। \(\sqrt{7}\) को (7) समझना सामान्य गलती है।

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एक छात्र \(x^2+2x+1\) की घात (3) बताता है क्योंकि इसमें (3) पद हैं। सही घात क्या है?

A student says the degree of \(x^2+2x+1\) is (3) because it has (3) terms. What is the correct degree?

Explanation opens after your attempt
Correct Answer

B. (2)

Step 1

Concept

Degree is decided by the highest power (2), not by the number of terms. Avoid this common exam mistake.

Step 2

Why this answer is correct

The correct answer is B. (2). Degree is decided by the highest power (2), not by the number of terms. Avoid this common exam mistake.

Step 3

Exam Tip

घात पदों की संख्या से नहीं, सबसे बड़ी घात (2) से तय होती है। यह सामान्य गलती परीक्षा में न करें।

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\(4^2+4^3\) का मान क्या है?

What is the value of \(4^2+4^3\)?

Explanation opens after your attempt
Correct Answer

B. (80)

Step 1

Concept

This is addition, so exponents are not added. \(4^2+4^3=16+64=80\).

Step 2

Why this answer is correct

The correct answer is B. (80). This is addition, so exponents are not added. \(4^2+4^3=16+64=80\).

Step 3

Exam Tip

यहाँ जोड़ है इसलिए घातें नहीं जुड़तीं। \(4^2+4^3=16+64=80\) है।

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कौन सा ((a-b)2) के बराबर है?

Which is equal to ((a-b)2)?

Explanation opens after your attempt
Correct Answer

B. \(a^2-2ab+b^2\)

Step 1

Concept

The middle term in ((a-b)2) is (-2ab). The correct expansion is \(a^2-2ab+b^2\).

Step 2

Why this answer is correct

The correct answer is B. \(a^2-2ab+b^2\). The middle term in ((a-b)2) is (-2ab). The correct expansion is \(a^2-2ab+b^2\).

Step 3

Exam Tip

((a-b)2) में मध्य पद (-2ab) होता है। सही विस्तार \(a^2-2ab+b^2\) है।

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\(3^2+3^3\) का मान क्या है?

What is the value of \(3^2+3^3\)?

Explanation opens after your attempt
Correct Answer

B. (36)

Step 1

Concept

This is addition, so exponents are not added. \(3^2+3^3=9+27=36\).

Step 2

Why this answer is correct

The correct answer is B. (36). This is addition, so exponents are not added. \(3^2+3^3=9+27=36\).

Step 3

Exam Tip

यहाँ जोड़ है इसलिए घातें नहीं जुड़तीं। \(3^2+3^3=9+27=36\) है।

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कौन सा ((x-y)2) के बराबर है?

Which is equal to ((x-y)2)?

Explanation opens after your attempt
Correct Answer

B. \(x^2-2xy+y^2\)

Step 1

Concept

The middle term in ((x-y)2) is (-2xy). Therefore the correct expansion is \(x^2-2xy+y^2\).

Step 2

Why this answer is correct

The correct answer is B. \(x^2-2xy+y^2\). The middle term in ((x-y)2) is (-2xy). Therefore the correct expansion is \(x^2-2xy+y^2\).

Step 3

Exam Tip

((x-y)2) में मध्य पद (-2xy) होता है। इसलिए सही विस्तार \(x^2-2xy+y^2\) है।

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\(2^3+2^4\) का मान क्या है?

What is the value of \(2^3+2^4\)?

Explanation opens after your attempt
Correct Answer

B. (24)

Step 1

Concept

This is addition, so exponents are not added. \(2^3+2^4=8+16=24\).

Step 2

Why this answer is correct

The correct answer is B. (24). This is addition, so exponents are not added. \(2^3+2^4=8+16=24\).

Step 3

Exam Tip

यहाँ योग है इसलिए घातें नहीं जुड़ेंगी। \(2^3+2^4=8+16=24\) है।

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