Question

H c f of 98 and 84 and 138 using prime Factorisation method

Answer 1

$98 = 2 \times 7 \times 7$
$84 = 2 \times 2 \times 3 \times 7$
$138 = 2 \times 3 \times 23$
in this the 2 is common number so
LCM is
$2 \times 7 \times 7 \times 2 \times 3 \times 7 \times 3 \times$
$\times 23 = 142002$
and HCF is common number that is 2
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Answer 2

HCF is 2

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