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Q.

Find the HCF of 18, 24, 30, 40 ?

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a

120

b

2

c

1200

d

4

answer is B.

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Detailed Solution

$H . C . F o f 18, 24, 30, 40$

$18 = 2 \times 3^{2}$

$24 = 2^{3} \times 3$

$30 = 2 \times 3 \times 5$

$40 = 2^{3} \times 5$

$∴ H . C . F = 2$

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