Online Test — Factors & Multiples
10 Questions • 15 min • Chapter MCQ
15:00
Question 1 of 10
easy
Which is a common multiple of 5 and 10?
10
15
25
12
Explanation: 10 is a multiple of both 5 and 10.
Question 2 of 10
medium
Is 20 a multiple of 5?
Yes
No
Only sometimes
Cannot tell
Explanation: 5 × 4 = 20, so yes.
Question 3 of 10
easy
The only even prime number is…
2
4
6
0
Explanation: 2 is the only even prime.
Question 4 of 10
medium
The smallest common multiple of 3 and 5 is…
8
15
30
10
Explanation: 15 is the first common multiple.
Question 5 of 10
medium
Which of these numbers is composite?
17
19
21
23
Explanation: 21 = 3 × 7.
Question 6 of 10
medium
Which number is a factor of BOTH 6 and 9?
2
3
6
9
Explanation: 3 divides both 6 and 9.
Question 7 of 10
medium
The smallest common multiple of 4 and 6 is…
12
24
10
6
Explanation: 12 is the first number in both times tables.
Question 8 of 10
medium
Which list has only PRIME numbers?
2, 3, 5, 7
2, 4, 6, 8
1, 3, 5, 9
3, 5, 9, 11
Explanation: 2, 3, 5, 7 are all prime.
Question 9 of 10
medium
Which is a multiple of 7?
27
28
25
32
Explanation: 7 × 4 = 28.
Question 10 of 10
easy
Which is a common multiple of 2 and 3?
6
8
9
10
Explanation: 6 is in both the 2- and 3-times tables.