If x is divided by 7, the remainder is 5. What is the remainder if 4x is divided by 7? Answers.
A) 1
B) 2
C) 4
D) 6
E) 8

Rationale: x = 7 q + 5 4 x = 7 * 4 q + 20 4 x = 7 * 4 q + 7 * 2 + 6 4 x = 7 ( 4 q + 2 ) + 6 4 x = 7 k + 6 ( k = 4 q + 2 ) answer d
Answer: D