If 1square=4, 2square=10, 3square=21 then 4square=__?

Answer Posted / apurva khandelwal

1square=1*4=4
2square=2*(4+1)=10
3square=3*(5+2)=21
4square=4*(7+3)=40

Is This Answer Correct ?    7 Yes 3 No



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