Online Test — Factors, Multiples, HCF & LCM
10 Questions • 30 min • Chapter MCQ
30:00
Question 1 of 10
medium
LCM of 6 and 8 = ?
24
48
12
16
Explanation: Smallest common multiple of 6 and 8 is 24.
Question 2 of 10
easy
Which number is COMPOSITE?
7
13
9
5
Explanation: 9 = 1, 3, 9, so it has more than two factors.
Question 3 of 10
hard
The smallest composite number is…
1
2
3
4
Explanation: 4 is the smallest composite (factors 1, 2, 4).
Question 4 of 10
medium
Which list contains 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 5 of 10
hard
How many factors does 16 have?
3
4
5
6
Explanation: 1, 2, 4, 8, 16 → five factors.
Question 6 of 10
easy
Which of these is a factor of 12?
5
4
7
8
Explanation: 12 ÷ 4 = 3 exactly, so 4 is a factor.
Question 7 of 10
easy
LCM of 3 and 5 = ?
8
15
30
10
Explanation: No common factor, so 3 × 5 = 15.
Question 8 of 10
easy
Which of these is a factor of 18?
5
9
7
4
Explanation: 18 ÷ 9 = 2 exactly.
Question 9 of 10
hard
How many prime numbers are there between 1 and 10?
3
4
5
6
Explanation: 2, 3, 5, 7 → four primes.
Question 10 of 10
medium
LCM of 2, 3 and 4 = ?
6
12
24
8
Explanation: 12 is the smallest number divisible by 2, 3 and 4.