Practice focused topic-wise MCQs with answers and explanations for quick revision and exam preparation.
Difficulty select karke sirf is topic ke focused MCQs practice karein. Score, timer aur explanations student-friendly flow me milenge.
Showing 591-600 of 600 questions.
A. ((88,66))
समीकरण (x+y=154) और (x-y=22) हैं। इन्हें हल करने पर (x=88), (y=66), जो ग्राफ का प्रतिच्छेद है। / The equations are (x+y=154) and (x-y=22). Solving gives (x=88), (y=66), which is the graph intersection.
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If the lines (8x+ay=40) and (24x+18y=120) are coincident, what is the value of (a)?
C. (6)
दूसरा समीकरण पहले का (3) गुना है, इसलिए (3a=18) और (a=6)। अनुपात जांच में स्थिर पद भी शामिल करें। / The second equation is (3) times the first, so (3a=18) and (a=6). Include the constant term in ratio checking.
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For which value will (5x+9y=45) and (10x+18y=k) be distinct parallel lines?
B. (k=88)
गुणांक का अनुपात \(\frac{1}{2}\) है, इसलिए संपाती होने के लिए (k=90) चाहिए। (k=88) पर रेखाएं समांतर अलग-अलग हैं। / The coefficient ratio is \(\frac{1}{2}\), so coincidence needs (k=90). For (k=88), the lines are distinct and parallel.
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If the only intersection of two lines is ((r,s)) and (4r+s=29), (r-s=1), what is (r+s)?
C. (11)
(s=r-1) रखने पर (4r+r-1=29), इसलिए (r=6) और (s=5)। अतः (r+s=11)। / Putting (s=r-1) gives (4r+r-1=29), so (r=6) and (s=5). Therefore (r+s=11).
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If the graphical solution of (5x-y=19) and (x+y=5) is ((p,q)), what is (p-q)?
C. (3)
हल करने पर (p=4) और (q=1) मिलता है। इसलिए (p-q=3), और यही प्रतिच्छेद से निकला मान है। / Solving gives (p=4) and (q=1). Therefore (p-q=3), which comes from the intersection point.
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If the lines (9x+2y=18) and (27x+my=55) are distinct parallel lines, what will be the value of (m)?
C. (6)
समांतर के लिए \(\frac{9}{27}=\frac{2}{m}\), इसलिए (m=6)। क्योंकि \(\frac{18}{55}\neq\frac{1}{3}\), रेखाएं संपाती नहीं हैं। / For parallel lines, \(\frac{9}{27}=\frac{2}{m}\), so (m=6). Since \(\frac{18}{55}\neq\frac{1}{3}\), the lines are not coincident.
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At which point will the lines (2x-5y=1) and (3x+2y=22) meet on the graph?
A. (\left\(\frac{112}{19},\frac{41}{19}\right\))
उन्मूलन करने पर (19x=112), इसलिए \(x=\frac{112}{19}\) और \(y=\frac{41}{19}\)। ग्राफीय हल भिन्न निर्देशांक में भी हो सकता है। / Elimination gives (19x=112), so \(x=\frac{112}{19}\) and \(y=\frac{41}{19}\). A graphical solution may also have fractional coordinates.
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Which point is chosen incorrectly for drawing the line (13x+4y=52)?
D. ((2,8))
((2,8)) रखने पर \(13\cdot2+4\cdot8=58\), जो (52) नहीं है। ग्राफ बनाने से पहले हर बिंदु को समीकरण में जांचें। / Substituting ((2,8)) gives \(13\cdot2+4\cdot8=58\), not (52). Check every point in the equation before drawing the graph.
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If the lines (7x+3y=42) and (21x+9y=k) are coincident, what will be the value of (k)?
C. (126)
दूसरा समीकरण पहले का (3) गुना होना चाहिए, इसलिए (k=126)। संपाती रेखाओं में स्थिर पद भी उसी अनुपात में बदलता है। / The second equation must be (3) times the first, so (k=126). In coincident lines, the constant term also changes in the same ratio.
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For two quantities, (5x+5y=140) and (6x-6y=24). What will be the solution by graphical method?
A. ((16,12))
सरल करने पर (x+y=28) और (x-y=4) मिलते हैं। इनका प्रतिच्छेद ((16,12)) है। / Simplifying gives (x+y=28) and (x-y=4). Their intersection is ((16,12)).
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