Question

hey guys
If

${1 }^{2} = 1 \\ {2}^{2} = 4 \\ {4}^{2} = 6 \\ {7}^{2} = 9$
Then
${9}^{2} =$

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Answer 1

I know it you get the square of the number and write the number in the ones place so your answer is 1