Online Test — Factors, Multiples, HCF & LCM
10 Questions • 30 min • Chapter MCQ
30:00
Question 1 of 10
hard
HCF of 24 and 36 = ?
6
8
12
4
Explanation: The biggest common factor of 24 and 36 is 12.
Question 2 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 3 of 10
medium
Is 20 a multiple of 5?
Yes
No
Only sometimes
Cannot tell
Explanation: 5 × 4 = 20, so yes.
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
medium
Is 1 prime or composite?
prime
composite
neither
both
Explanation: 1 has only one factor, so it is neither prime nor composite.
Question 7 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.
Question 8 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 9 of 10
medium
HCF of 8 and 12 = ?
2
4
6
8
Explanation: Common factors are 1, 2, 4 → highest is 4.
Question 10 of 10
easy
HCF of 12 and 18 = ?
3
6
9
12
Explanation: Common factors are 1, 2, 3, 6 → highest is 6.