Online Test : Playing With Numbers

1. ————- is a factor of every number.

2. Number of factors of a given number are ————

3. The number of multiples of a given number is —————

4. A number for which sum of all its factors is equal to twice the number called a —————— number.

5. The number which is not a perfect number is —————

6. Numbers having more than two factors are called ———

7. The numbers other than one whose only factors are 1 and the number itself are called ——————

8. What is the greatest prime number between 10 and 20?

9. The smallest composite number is ————-

10. Two numbers having only 1 as a common factor are called ———- numbers.

11. The LCM of 2 and 3 is ————-

12. The HCF of 9 and 27 is ————-

13. Which of the following statements are true?

14. Which of the following numbers are co-prime?

15. A number which has either 0 or 5 in its ones place is divisible by———–

16. Which of the following numbers is not a factor of 68?

17. Which of the following numbers is not a factor of 36?

18. Which of the following numbers is not a factor of 24? 

19. Which of the following numbers is not a factor of 15?

20. Which of the following number is not a factor of 21?