Q43 of 128 Page 25

If p, q, r are distinct primes, their l.c.m.. is ……

p,q and r are distinct primes.

So, they have no common factor other than 1.


Then their g. c. d is 1.


Therefore, l.c.m. of two numbers =


= = pqr

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If l.c.m.. of two numbers (greater than 1) is the product of them, then their g. c. d is ……

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g. c. d (15, 24, 40) = …….

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l.c.m. (15, 24, 40) = …….