CBSE Class 8 Answered

Using diagonal method, we have

From above, we have 8-digit square number which is obtained as below:

8th digit = 9

7th digit = 1 + 0 + 1 = 2

6th digit = 5 + 2 + 9 + 2 + 5 = 23 (2 carry forward)

5th digit = 3 + 1 + 5 + 4 + 5 + 1 + 3 + 2 = 24 (2 carry forward)

4th digit = 0 + 7 + 3 + 5 + 3 + 7 + 0 + 2 = 27 (2 carry forward)

3rd digit = 0 + 5 + 2 + 5 + 0 + 2 = 14 (1 carry forward)

2nd digit = 0 + 1 + 0 + 1 = 2

1st digit = 0

Hence, the required number is 2474329.