When 24 is divided by the positive integer a, the remainder is 4. Which of the following statements about a must be true?
I. a is even
II. a is a multiple of 5
III. a is a factor of 20
Answers:
A) III only  B) I and II only  C) I and III only  D) II and III only  E) I, II, and III
24= m*a + 4   m*a=20   put values of m   m=1 a=20   m=2 a=10   m=4 a=5   I. not true   II. true   III. true   D. correct
<result>D</result>
When 24 is divided by the positive integer a, the remainder is 4. Which of the following statements about a must be true?
I. a is even
II. a is a multiple of 5
III. a is a factor of 20