Question

sum of all positive integers that are both less than 100 and each number has exactly 5 positive integral facctors

Answer 1

144

Explanation:

1×2×3×4×x=48x<100

x<100/48

or x<25/12

but x is an integer

so x=1,2

48×1=48

48×2=96

reqd. sum=48+96=144