Answer to Question #301298 in Combinatorics | Number Theory for hangwy

Combinatorics | Number Theory

Question #301298

given that n is a positive even integer, 5n + 4 will always be divisible

A. 5n

B.5

C. 2

D. 4

Expert's answer

Let "n=2k,k=1,2,3,..."

Then "5n+4=10k+4=2(5k+2)=2m, m=7,8,9,..."

Therefore "5n + 4" will always be divisible by "2."

C. 2

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