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The LCM of two numbers is 7991 and the two numbers are 61 and 131. What will be their HCF?(a) 2(b) 1(c) 3(d) 4I had been asked this question at a job interview.The above asked question is from Real Numbers in section Real Numbers of Mathematics – Class 10

Answer»

Correct ANSWER is (b) 1

The EXPLANATION: For two numbers a and b, we know that

(a × b) = HCF of (a, b) × LCM of (a, b)

Here a = 61 and b = 131, and LCM is 7991

61 × 131 = HCF × 7991

HCF = \(\frac {7991}{7991}\) = 1



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