Data Sufficiency

S8-20 If k and n are integers, is n divisible by 7?

(1) n – 3 = 2k
(2) 2k – 4 is divisible by 7.

Stem1 : n-3 = 2K can be written as n=2k+3, so there any multiple values for k & n and those may or may not be divisible by 7. so this is not sufficient.

Stem2: 2K-4 is divisible by 7, so K = 9, 16 etc., but this doesn't tell anything about n. so this is also not sufficient.

By using both statements, n is divisible by 7. So the answer is C.

What is the OA ?

OA is 'C'.