Question

3.
(a) 15
Find the prime factorisation of the following numbers by factor tree method :
(a) 15
(b) 45
(c) 54
(d) 64
(e) 78

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Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

15 = 3 x 5

45 = 5 x 9 = 5 x 3 x 3

54 = 2 x 27 = 6 x 9 = 2 x 3 x 3 x  3

64 = 8 x 8 = 2 x 4 x 2 x 4 = 2 x 2 x 2 x 2 x 2 x 2

78 = 2 x 39 = 2 x 3 x 13

Step-by-step explanation:

15 = 3 x 5

45 = 5 x 9 = 5 x 3 x 3

54 = 2 x 27 = 6 x 9 = 2 x 3 x 3 x  3

64 = 8 x 8 = 2 x 4 x 2 x 4 = 2 x 2 x 2 x 2 x 2 x 2

78 = 2 x 39 = 2 x 3 x 13