Prime Time — Prime Time | Subjective Questions & Answers | Class 6 Mathematics

1 List the positive factors of 2 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2. The number is prime.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

2 List the positive factors of 3 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 3. The number is prime.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

3 List the positive factors of 4 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 4. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

4 List the positive factors of 5 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 5. The number is prime.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

5 List the positive factors of 6 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 3, 6. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

6 List the positive factors of 7 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 7. The number is prime.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

7 List the positive factors of 8 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 4, 8. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

8 List the positive factors of 9 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 3, 9. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

9 List the positive factors of 10 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 5, 10. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

10 List the positive factors of 11 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 11. The number is prime.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

11 List the positive factors of 12 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 3, 4, 6, 12. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

12 List the positive factors of 13 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 13. The number is prime.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

13 List the positive factors of 14 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 7, 14. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

14 List the positive factors of 15 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 3, 5, 15. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

15 List the positive factors of 16 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 4, 8, 16. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

16 List the positive factors of 17 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 17. The number is prime.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

17 List the positive factors of 18 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 3, 6, 9, 18. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

18 List the positive factors of 19 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 19. The number is prime.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

19 List the positive factors of 20 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 4, 5, 10, 20. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

20 List the positive factors of 21 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 3, 7, 21. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

21 List the positive factors of 22 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 11, 22. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

22 List the positive factors of 23 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 23. The number is prime.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

23 List the positive factors of 24 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 3, 4, 6, 8, 12, 24. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

24 List the positive factors of 25 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 5, 25. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

25 List the positive factors of 26 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 13, 26. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

26 List the positive factors of 27 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 3, 9, 27. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

27 List the positive factors of 28 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 4, 7, 14, 28. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

28 List the positive factors of 29 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 29. The number is prime.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

29 List the positive factors of 30 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 3, 5, 6, 10, 15, 30. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

30 List the positive factors of 31 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 31. The number is prime.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

31 List the positive factors of 32 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 4, 8, 16, 32. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

32 List the positive factors of 33 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 3, 11, 33. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

33 List the positive factors of 34 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 17, 34. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

34 List the positive factors of 35 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 5, 7, 35. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

35 List the positive factors of 36 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 3, 4, 6, 9, 12, 18, 36. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

36 List the positive factors of 37 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 37. The number is prime.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

37 List the positive factors of 38 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 19, 38. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

38 List the positive factors of 39 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 3, 13, 39. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

39 List the positive factors of 40 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 4, 5, 8, 10, 20, 40. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

40 List the positive factors of 41 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 41. The number is prime.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

41 List the positive factors of 42 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 3, 6, 7, 14, 21, 42. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

42 List the positive factors of 43 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 43. The number is prime.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

43 List the positive factors of 44 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 4, 11, 22, 44. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

44 List the positive factors of 45 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 3, 5, 9, 15, 45. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

45 List the positive factors of 46 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 23, 46. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

46 List the positive factors of 47 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 47. The number is prime.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

47 List the positive factors of 48 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 3, 4, 6, 8, 12, 16, 24, 48. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

48 List the positive factors of 49 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 7, 49. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

49 List the positive factors of 50 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 2, 5, 10, 25, 50. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.

50 List the positive factors of 51 and decide whether it is prime or composite. 2 marks

Model answer

The positive factors are 1, 3, 17, 51. The number is composite.

Explanation

A prime number has exactly two positive factors; a composite number has more than two.