Data sufficiency

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Data sufficiency

by Neha sharma » Mon Sep 14, 2020 7:23 pm
M and N are two positive integers and each of them has 20 factors. If r is the total number of prime factors of M and s is the total number of prime factors of N,then what is the maximum value of r-s?

a)0
b)1
c)2
d)6
e)26