Question

1.
Find the prime factorisation of the following.
(a) 78
(b) 120
(c) 256​

Answer 1

Step-by-step explanation:

78 = 1 x 78, 2 x 39, 3 x 26, or 6 x 13. Factors of 78: 1, 2, 3, 6, 13, 26, 39, 78. Prime factorization: 78 = 2 x 3 x 13

Factors of 120: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120. Prime factorization: 120 = 2 x 2 x 2 x 3 x 5, which can also be written 120 = 2³ x 3 x 5.

Answer 2

Answer:

a) 2×3×13

b)2×2×2×3×5

c)2×2×2×2×2×2×2×2