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Square of an Odd Number as a Sum

Form a three ...

Question

Form a three digit number from the given digits $1, 8, 6, 9$ such that the number thus formed is square of $13$ .

A

179

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B

189

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C

196

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D

169

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Solution

The correct option is D $169$
Square of $13 = 13^{2} = 169$
$169$ can be formed from the digits $1, 6, 9$ which belongs to the set $1, 8, 6, 9.$

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