Question

Choose the right option.
(i) The HCF of 120 and 150 is
...
(1) 30 (2) 45 (3) 20 (4) 120
(ii) The HCF of this pair of numbers is not 1.
(1) 13, 17 (2) 29, 20 (3) 40, 20 (4) 14, 15​

Answer 1

Answer:

(I) 30

(ii) option 3 40,20

Answer 2

Answer:

HCF = 2 × 3 × 5 = 30

Hence, the correct answer is option (1).

(ii)

40 = 2 × 2 × 2 × 5

20 = 2 × 2 × 5

The HCF of 20 and 40 is 2 × 2 × 5 or 20.

Hence, the correct answer is option (3).