1.

1). 52). 63). 14). 3

Answer»

A number M is divisible by 25 if it ends with 00, 25, 50, or 75.

(M + 5)(M + 1) = M2 + 6M + 5

When a number (X + Z) is always divisible by y, the remainder of (x + z) when divided by y will be zero

When M2 + 6M + 5 is divided by 25, the remainder will be due to sum of that.

M is divisible by 25, M2 is also divisible by 25

6M will also be divisible by 25

5 when divided by 25 leaves the remainder of 5

So the sum M2 + 6M + 5 is divided by 25, the remainder will be 5



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