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24. Find the sum of even numbers between

(a) 191 and 2'& (b) !'9 and !14

25. 5, 7, x, 13, y, 19, ...

iven above a list of *rime numbers, find the value of(a) x # (b) 2# + x

26. -ic the *rime numbers from the following lists.

(a) 12, 1&, !!, %!, 119, 121 (b) 9, 11, &, "&, &1, 19%

27. /ist all *rime numbers between

(a) !' and ' (b) "' and &'

28. 17, 19, x, 29, y, ...

iven above a list of *rime numbers, find the value of

(a)x + 2y (b) !x #

29. (a) 0rite the first *rime numbers.(b) Find the sum of the first ! *rime numbers.

30. Find the sum of all the factors of(a) (b) ""

31. iven 4 is factor of # and # is the factor of %% , find two *ossible value of #.

32. /ist all the factors of

(a) "' (b) &'

33. /ist all the factors of(a) "% ( b) "9

34. etermine all the factors of

(a) ! (b) 4'

!

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35. /ist the *rime factors of

(a) 4% (b) %

36. Find the sum of all the common factors of

(a) !! and "9 (b) 44 and

37. 0rite the following numbers as a *roduct of *rime factors.

(a) ' (b) "'

38. Find the sum of all the *rime factors of(a) &% (b) %%

39. 0rite the following numbers as a *roduct of *rime factors.

(a) " (b) &

40. x*ress the following numbers in *rime factors.

(a) 9" (b) 1'%

41. Find the sum of all the *rime factors of

(a) 1&% (b) 1%%

42. Find the *roduct of the smallest and largest *rime factors of

(a) 114 (b) 11%

43. Find the sum of the smallest and largest *rime factors of

(a) %4 (b) 9

44. Find the *roduct of the smallest and largest *rime factors of(a) ' (b) 9'

45. Find the sum of all the *rime factors of(a) 21" (b) !2'

46. x*ress the following numbers as the *roduct of *rime factors.

(a) 1!% (b) 1"2

4

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47. x*ress the following numbers as the *roduct of *rime factors.

(a) 24 (b) !"

48. etermine the number of multi*les of between

(a) 2' and 4' (b) 42 and &'

49. /ist all the number of multi*les of % between

(a) 2' and 4' (b) ! and "9

50. (a) /ist all the multi*les of % which are less than !'.(b) /ist all the multi*les of 9 which are between !2 and '.

51. (a) /ist all the common multi*les of 2 and which are less than %'.

(b) /ist all the common multi*les of ! and " which are less than 4'.

52. (a) $tate the first three common multi*les of 4 and &.

(b) $tate the first three common multi*les of and ".

53. (a) $tate the common multi*les of ! and & between 2' and "'.

(b) $tate the common multi*les of " and & between 2' and "'.

54. (a) $tate the common factors of !, " and 9.

(b) $tate the common factors of !, 4 and %.

55. $tate the first three common multi*les of

(a) 4 and 9 (b) and 9

56. $tate the first two common multi*les of(a) & and % (b) % and 9

57. $tate the common factors of(a) ', "' and %' (b) , "' and "

58. Find the lowest common multi*le of

(a) 1', 12 and 14 (b) ", 1' and 1

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59. /ist the lowest common multi*le of

(a) % and 24 (b) 12 and 24

60. Find the lowest common multi*le of

(a) " and 1% (b) 9 and 11

61. Find the lowest common multi*le of(a) 12 and 2" (b) & and 12

62. Find the lowest common multi*le of(a) and 1 (b) " and 14

63. Find the lowest common multi*le of

(a) ! and 9 (b) 4 and 12

64. Find the lowest common multi*le of

(a) !, 4 and " (b) 4, " and 1!

65. /ist the common factors of

(a) " and 24 (b) % and 2"

66. Find the common factors of

(a) 2, % and 24 (b) !, and 2'

67. Find the common factors of(a) 21 and 42 (b) 2 and &

68. $tate the common factors of(a) 1, 2' and !' (b) 12, 24 and "

69. Find the common factors of(a) !4 and % (b) !% and "'

70. Find the sum of all the common factors of

(a) 2, 12 and 2' (b) !, and 1'

71. Fine the common factor of

"

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