LCM of $81, 18$ and $36$ is

81

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162

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324

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36

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Solution

The correct option is A $324$
$81 = 3 \times 3 \times 3 \times 3$
$18 = 2 \times 3 \times 3$
$36 = 2 \times 2 \times 3 \times 3$
L.C.M $= 2 \times 2 \times 3 \times 3 \times 3 \times 3 = 324$

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81, 18

36

Area of a square whose perimeter is 36 cm is

The HCF of two numbers is 27 and their LCM is 162. If one of the numbers is 54, what is the othe number ?

(a) 36 (b) 45 (e) 9 (f) 81

36

54

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