LCM and HCF Practice Test 2

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Question : 29 of 40

Marks: +1, -0

HCF of

4 × 27 × 3125

,

8 × 9 × 25 × 7

and

16 × 81 × 5 × 11 × 49

is

1260
540
360
180

Solution:

4 × 27 × 3125

= 2^2 × 3^3 × 5^5

8 × 9 × 25 × 7

= 2^3 × 3^2 × 5^2 × 7

16 × 81 × 5 × 11 × 49

= 2^4 × 3^4 × 5 × 7^2 × 11

∴ HCF

= 22 × 32 × 5

= 4 × 9 × 5 = 180

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