Question

Whch of the following could be the value of d such that $15\equiv 3\left(modd\right)$.

• A. 2
• B. 1
• C. 4
• D. 3

Answer 1

The correct option is C 4

$15\equiv 3\left(modd\right)$, means 15 - 3 = kd, for some integer k.
12 = kd
gives d divides 12. The divisors of 12 are 1, 2, 3, 4, 6, 12. But d should be larger than 3 and so the possible values for d are 4, 6, 12.