Number System Practice Test 2

Question : 23 of 40

Marks: +1, -0

If P is divisible by 13, then find the remainder when (P + 1) (P + 13) is divided by 13.

Solution:

(P + 1) (P + 13)

= P^2 + 14P + 13

.
Since P is divisible by

13, P^2

and 14P are also clearly divisible by 13.
So, remainder = 0.

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