When a certain number is divided by 7, the remainder is zero. If the remainder is not zero when that number is divided by 14, then the remainder must be------
A
1
B
2
C
7
D
13
Correct Answer: 7
The number should be multiple of 7 Let, the number be 21 Now, (21/7) = 3, reminder 0 And (21/14) = 1, reminder 7