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Sequence

Select the co...

Question

Select the correct alternative to replace the '?'
$90 : 81 :: 120 :$ ?

A

144

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B

143

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C

121

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D

120

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Solution

The correct option is C $144$
90 is $10 \times 9$
81 is $9 \times 9$
Similarly,
120 is $10 \times 12$
144 is $12 \times 12$
So, it is 144.

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