Question

Without actual addition find the sum 1+3+5+7

Answer 1

Answer:

it is 16 because sun of consecutive odd no. is always the square of no. of digits as here there are 4 digits so (4) 2= 16

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Answer 2

Answer:

16

Step-by-step explanation:

Square of 4 is 16

so the answer is 16

Method

1+2+5+7 are 4 digits

so 4squuare= 16