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Find the LCM and HCF of 6 and 20.
Question

Find the LCM and HCF of 6 and 20.

A.

60, 3

B.

120, 2

C.

80, 2

D.

60, 2

Correct option is D

Given:

Two numbers: 6 and 20

Concept Used:

HCF (Highest Common Factor): Product of common prime factors with lowest powers

LCM (Least Common Multiple): Product of all prime factors with highest powers

Solution:

6 = 2×3

20 = 22×52^2 \times 5​​

HCF = 2

LCM = 22×3×52^2 \times 3 \times 5​ = 60

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