Data Sufficiency (DS) | Re: If r and s are positive integers, is rs a multiple of 25?

Hi

Here are my two cents for this question

We are asked if product of rs if mulitple of 25k

so if rs =25k,
this can be possible in following scenarios
(a) if r is multiple of 25 or
(b)s is multiple of 25 or
(c)r and s are each multiple of 25
(d)or r and s are each multiples of 5.

Now statement 1 gives us that difference of two integers is multiple of 5

Essentially they could be each not multiple of 5 or 25 and we could have difference which is multiple of 5 or we could have each multiple
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