Question

10. Without actual addition, find the sum of
(a) 1 + 3 + 5 + 7​

Answer 1

Answer:

16

Step-by-step explanation:

The sum of first 4 odd number...

Answer 2

Answer:

there are 4 numbers =1,3,5,7

so we can do the sum without actual division.

the square of total number=4²=16 is answer