Question

Prove that one and only one of n, n+4, n+8, n+12 and n+16 is divisible by 5.
I want step by step explanation. ​

Answer 1

Answer:

We definitely get one and only one of given numbers is divisible by 5. Hence, one and only one out of n, n+ 4, n+ 8, n+12 and n+16 is divisible by 5. On dividing on n by 5, letq be the quotient and r be the remainder. Then =5q + r, where 0<r< 5.

Answer 2

Answer:

X=4 will be the answer

as

n+4+n+8+n+12+n+16/5

then it will be

4x+40/5

4x+8

X=8-4

X=4

Step-by-step explanation:

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