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The number of all possible squares in nx...

The number of all possible squares in `nxxn` network is equal to `1^(2)+2^(2)+3^(2)+. . . .+n^(2)` . Find the number of possible squares in `7xx7` network.

A

103

B

91

C

120

D

140

Text Solution

Verified by Experts

The correct Answer is:
D
Number of all possible squares in `n xx n` network
`=(1^(2)+2^(2)+3^(2)+ . . . . . .+n^(2))`
`=1^(2)+2^(2)+3^(2)+ . . . . . . . .+7(2)(because n=7)`
`=140`
Hence, the correct option is (d).
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