On dividing 23 by a number, the quotient is 5 and the remainder is 3. Find the divisor.
Choose the correct choice.
A) 1
B) 2
C) 4
D) 6
E) 7

Rationale: d = ( d - r ) / q = ( 23 - 3 ) / 5 = 20 / 5 = 4 c
Answer: C