1) Which of these are the factors of 36? a) 1 b) 18 c) 5 d) 16 e) 6 f) 2 2) Which of these are not the factors of 90? a) 1 b) 20 c) 15 d) 12 e) 9 f) 25 3) Find all the factors of 25. a) 1, 25 b) 1,5 c) 5, 10, 25 d) 1, 5, 10, 15, 25 e) 1, 5, 25 f) none of the answers 4) The smallest factor of every number is .................... a) 0 b) the number itself c) 1 d) 2 5) The greatest factor of 32 is ...................... a) 16 b) 64 c) 32 d) 128 e) 2 f) 8 6) Number 17 has only .................... factors a) 2 b) 3 c) 4 d) 5 7) Which is the smallest number that has 2, 3 and 7 as factors? a) 21 b) 14 c) 63 d) 84 e) 42 f) 237 8) How many factors does number 44 have? a) 2 b) 3 c) 4 d) 5 e) 6 f) 7 9) How many factors does number 27 have? a) 1 b) 2 c) 3 d) 4 e) 5 f) 6 10) Which are the prime factors of number 30? a) 1, 2, 15 b) 2, 3, 5 c) 1, 2, 3, 5 d) 2, 15 e) 1, 3, 10 f) 3, 10

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