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 71-80 of 600 questions.
The sum of a number and its square is (156). What is the positive number?
C. (12)
\(x^2+x=156\) से \(x^2+x-156=0\), इसलिए (x=12) है। संख्या और उसके वर्ग के योग को सीधे लिखें। / \(x^2+x=156\) gives \(x^2+x-156=0\), so (x=12). Write the sum of the number and its square directly.
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The sum of a number and its square is (210). What is the positive number?
B. (14)
\(x^2+x=210\) से \(x^2+x-210=0\), जिसका धनात्मक हल (14) है। गुणनखंड बनाते समय (210) के गुणनखंड देखें। / \(x^2+x=210\) gives \(x^2+x-210=0\), whose positive solution is (14). While factoring, check factors of (210).
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The product of two consecutive odd positive numbers is (255). What is the smaller number?
B. (15)
लगातार विषम संख्याएँ (x) और (x+2) हैं, इसलिए (x(x+2)=255) से (x=15) है। विषम लगातार संख्याओं में अंतर (2) होता है। / Consecutive odd numbers are (x) and (x+2), so (x(x+2)=255) gives (x=15). Consecutive odd numbers differ by (2).
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The product of two consecutive even positive numbers is (360). What is the larger number?
B. (20)
लगातार सम संख्याएँ (x) और (x+2) होंगी, तब (x(x+2)=360) से (x=18) है। इसलिए बड़ी संख्या (20) है। / Consecutive even numbers are (x) and (x+2), then (x(x+2)=360) gives (x=18). So the larger number is (20).
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The product of two consecutive odd numbers is (399). What is the larger number?
C. (21)
(x(x+2)=399) से (x=19), इसलिए बड़ी संख्या (21) है। ऐसे प्रश्नों में (x+2) का प्रयोग करें। / (x(x+2)=399) gives (x=19), so the larger number is (21). In such questions, use (x+2).
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The product of two consecutive even numbers is (528). What is the smaller number?
B. (22)
(x(x+2)=528) से (x=22) मिलता है। सम लगातार संख्याओं का अंतर (2) याद रखें। / (x(x+2)=528) gives (x=22). Remember that consecutive even numbers differ by (2).
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B. (20) मीटर(20) m
चौड़ाई (x) हो तो (x(x+14)=480), जिससे (x=20) है। क्षेत्रफल में दोनों आयामों को गुणा करें। / If breadth is (x), then (x(x+14)=480), giving (x=20). For area, multiply both dimensions.
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B. (10) सेमी(10) cm
(x(x+15)=250) से (x=10) है। अंत में \(10 \times 25=250\) से जाँच करें। / (x(x+15)=250) gives (x=10). Check at the end using \(10 \times 25=250\).
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A number multiplied by (12) more than itself gives (405). What is the number?
B. (15)
(x(x+12)=405) से (x=15) मिलता है। गुणनफल वाले प्रश्नों में कोष्ठक जरूर लगाएँ। / (x(x+12)=405) gives (x=15). In product questions, always use brackets.
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A number multiplied by (7) less than itself gives (198). What is the larger number?
A. (18)
बड़ी संख्या (x) हो तो (x(x-7)=198), जिससे (x=18) है। कम मान को (x-7) से दिखाएँ। / If the larger number is (x), then (x(x-7)=198), giving (x=18). Show the lesser value by (x-7).
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