Concept-wise Practice

trick-question MCQ Questions for Class 10

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

Practice Questions

2 questions tagged with trick-question.

Question 1/2 Hard Mathematics Polynomials Irrational numbers and real numbers Class 10 Level 25

कौन सा विकल्प \(x=\sqrt{2}+\sqrt{3}\) के लिए सही द्विघात समीकरण है?

Which option is a correct quadratic equation for \(x=\sqrt{2}+\sqrt{3}\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-10x^0+1=0\)

Step 1

Concept

Actually \(x=\sqrt{2}+\sqrt{3}\) satisfies \(x^4-10x^2+1=0\), not a simple quadratic here. Read powers carefully in such trick questions.

Step 2

Why this answer is correct

The correct answer is A. \(x^2-10x^0+1=0\). Actually \(x=\sqrt{2}+\sqrt{3}\) satisfies \(x^4-10x^2+1=0\), not a simple quadratic here. Read powers carefully in such trick questions.

Step 3

Exam Tip

\(x^2=5+2\sqrt{6}\) और संयुग्मी के साथ गुणन से \(x^4-10x^2+1=0\) मिलता है। दिए विकल्प में \(x^0=1\) इसलिए पहला रूप सही नहीं दिखता, ध्यान से पढ़ें।

Open Question Page
Ask Friends
Question 2/2 Hard Mathematics Real Numbers 7: Decimal expansion of rational numbers Class 10 Level 19

यदि \(\frac{p}{q}\) सरलतम रूप में है और \(q=2^2\cdot 5^3\cdot 3^0\), तो दशमलव प्रसार के लिए सही निष्कर्ष क्या है?

If \(\frac{p}{q}\) is in lowest form and \(q=2^2\cdot 5^3\cdot 3^0\), what is the correct conclusion about the decimal expansion?

Explanation opens after your attempt
Correct Answer

B. सांत, क्योंकि \(3^0=1\) हैTerminating because \(3^0=1\)

Step 1

Concept

\(3^0=1\), so there is actually no factor (3) in the denominator.

Step 2

Why this answer is correct

The denominator is \(2^2\cdot 5^3\), containing only (2) and (5). Hence the decimal terminates.

Step 3

Exam Tip

Do not get confused by a zero exponent. चरण 1: \(3^0=1\), इसलिए हर में वास्तव में (3) का गुणनखंड नहीं है। चरण 2: हर \(2^2\cdot 5^3\) ही है, जिसमें केवल (2) और (5) हैं। इसलिए दशमलव सांत होगा। चरण 3: शून्य घात को लेकर भ्रम न करें।

Open Question Page
Ask Friends
Student Class Required

Select your class first

Quiz questions, daily challenge and practice pages will open according to your selected class. Class 11/12 ke liye stream bhi select karein.