Question

2) By observation only, find out which of the following are not perfect squares. (i) 51984 (ii) 38025 (iii) 74567 (iv) 326822 (v) 583968 (vi) 495616 (vii) 584300 (viii) 3000 (ix) 630000 (x) 242862 (xi) 56250 (xii) 53467​

Answer 1

Answer:

The following numbers are obviously not perfect squares. Give reason.

i. 1057

ii. 23453

iii. 7928

iv. 222222

v. 64000

vi. 89722

vii. 222000

viii. 505050

Answer:

We know that natural numbers ending in the digits 0, 2, 3, 7 and 8 are not perfect

squares.

i. 1057 ⟹ Ends with 7