CBSE Class 6 Maths Prime Time (Class 6 NCERT New) Quiz 4

1. Which of these numbers has exactly 3 factors?

A 4 B 6 C 8 D 10

2. A number leaves remainder 1 when divided by 2, 3, and 4. What is the smallest such positive number?

A 12 B 13 C 25 D 37

3. Two friends clap together every 20 seconds and 30 seconds respectively. After how many seconds will they clap together again?

A 40 B 50 C 60 D 120

4. How many even prime numbers exist?

A 0 B 1 C 2 D Infinitely many

5. A number is divisible by 9 and 10. Which one of the following must it also be divisible by?

A 18 B 45 C 90 D 100

6. Which of these pairs are co-prime?

A 14 and 21 B 8 and 15 C 12 and 18 D 20 and 45

7. When 28 is divided by one of its factors, the quotient is 7. Which factor was used?

A 2 B 3 C 4 D 5

8. A number has exactly 8 factors. Which of these could be the number?

A 18 B 20 C 30 D 49

9. The smallest 4-digit number divisible by 6 and 8 is —

A 1000 B 1008 C 1016 D 1020

10. Which of the following is a factor of 84 but not a factor of 42?

A 7 B 14 C 21 D 28