Question

Write allthe factors of the following numbers:

(a) 24 (b) 15 (c) 21

(d) 27 (e) 12 (f) 20

(g) 18 (h) 23 (i) 36

Answer 1

(a) 24

24 = 1 ×24 24 = 2 × 12 24 = 3 × 8

24 = 4 ×6 24 = 6 × 4

∴Factorsof 24 are 1, 2, 3, 4, 6, 8, 12, and 24

(b) 15

15 = 1 ×15 15 = 3 × 5 15 = 5 × 3

∴Factorsof 15 are 1, 3, 5, and 15

(c) 21

21 = 1 ×21 21 = 3 × 7 21 = 7 × 3

∴Factorsof 21 are 1, 3, 7, and 21

(d) 27

27 = 1 ×27 27 = 3 × 9 27 = 9 × 3

∴Factorsof 27 are 1, 3, 9, and 27

(e) 12

12 = 1 ×12 12 = 2 × 6 12 = 3 × 4 12 = 4 × 3

∴Factorsof 12 are 1, 2, 3, 4, 6, and 12

(f) 20

20 = 1 ×20 20 = 2 × 10 20 = 4 × 5 20 = 5 × 4

∴Factorsof 20 are 1, 2, 4, 5, 10, and 20

(g) 18

18 = 1 ×18 18 = 2 × 9 18 = 3 × 6 18 = 6 × 3

∴Factorsof 18 are 1, 2, 3, 6, 9, and 18

(h) 23

23 = 1 ×23 23 = 23 × 1

∴Factors of 23 are 1 and 23

(i) 36

36 = 1 ×36 36 = 2 × 18 36 = 3 × 12 36 = 4 × 9

36 = 6 ×6

∴Factorsof 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36