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Method of Finding LCM

If a and b ar...

Question

If a and b are two prime numbers then find LCM(a, b).

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Solution

If a and b are prime numbers,then they don't have any common factor.

a = 1 × a
b = 1 × b

HCF of a and b = 1

LCM $\times$ HCF = Product of two number

LCM(a,b) $\times$ HCF (a,b) = ab

LCM(a,b) $\times$ 1 = ab

LCM(a,b) = ab

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Q. a and b are two co-primes. Which of the following is/are true?
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H C F (a, b) = 15

L C M (a, b) = 1800

a = 30

b

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