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If r,s,t are prime numbers and p,q are the positive integers such that the L.C.M. of p,q is r2s4t2, then the number of ordered pairs of (p,q) is

A) 252




7 years ago


Answers : (1)


Hi raman malik

Required number of ordered pair (p, q) is (2 × 3 − 1) (2 × 5 −1) (2 × 3 − 1) = 225.

so answer  c is correct

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7 years ago

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