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Question

Find the LCM and HCF of 510 and 92 and verify that LCM.HCF = product of the two numbers. [4 MARKS]

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Solution

Prime factorisation : 1 Mark
H.C.F : 1 Mark
L.C.M : 1 Mark
Verification : 1 Mark


For 510 and 92

510=2×3×5×17

92=2×2×23=22×23

HCF = Product of the smallest power of each common prime factor in the numbers = 2

LCM = Product of the greatest power of each prime factor involved in the numbers
= 22×3×5×17×23=23460

LCM×HCF=2×23460=46920

Product of two given numbers
=510×92=46920

Therefore, it is proved that LCM × HCF = product of two given numbers.


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