Online Test — Factors & Multiples
10 Questions • 15 min • Chapter MCQ
15:00
Question 1 of 10
hard
The smallest common multiple of 6 and 8 is…
24
48
12
16
Explanation: 24 is the first number in both tables.
Question 2 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 3 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 4 of 10
hard
The factors of 24 are…
1, 2, 3, 4, 6, 8, 12, 24
1, 24
2, 12
1, 2, 4, 24
Explanation: All numbers dividing 24 exactly.
Question 5 of 10
medium
Is 1 prime or composite?
prime
composite
neither
both
Explanation: 1 has only one factor, so it is neither.
Question 6 of 10
medium
The factors of 8 are…
1, 2, 4, 8
1, 8
2, 4
1, 2, 3, 8
Explanation: 1, 2, 4 and 8 divide 8 exactly.
Question 7 of 10
hard
The smallest composite number is…
1
2
3
4
Explanation: 4 is the smallest composite (factors 1, 2, 4).
Question 8 of 10
medium
The smallest common multiple of 2 and 7 is…
9
14
21
7
Explanation: No common factor, so 2 × 7 = 14.
Question 9 of 10
hard
Which is a common multiple of 3, 4 and 6?
12
9
8
10
Explanation: 12 is divisible by 3, 4 and 6.
Question 10 of 10
easy
The first four multiples of 3 are…
3, 6, 9, 12
1, 3, 6, 9
3, 13, 23, 33
3, 5, 7, 9
Explanation: 3 × 1, 2, 3, 4 = 3, 6, 9, 12.