If a certain number X is divided by 62, the reminder is 7. what is the reminder when X+11 is divided by 31?	Choices.
A) 3	B) 5	C) 18	D) 6	E) 8

Rationale: x can be written as 62 k + 7 or x = 7 , 69,131 , etc . x + 11 = 62 k + 7 + 11 = 62 k + 18 or x + 11 = 18 , 80,142 etc . when divided by 31 , we will get the remainder 18 . c
Answer: C