Question

By observation only say which of the following
are not perfect square. Give reasons.
(a) 84597 (b) 51984 (c) 38025
(d) 456822 (e) 860000 (1) 23920
(g) 16000 (h) 234888 (1) 193243​

Answer 1

Answer:

(a) 84597 is not a perfect square because it ends in 7

(d) 456822 is not a perfect square because it ends in 2

(f) 23920 is not a perfect square because it ends with odd number of zeroes

(g) 16000 is not a perfect square because it ends with odd number of zeroes

(h) 234888 is not a perfect square because it ends in 8

(i) 193243 is not a perfect square because it ends in 3

NOTE:

• A number ending in 2,3,7 or 8 is never a perfect square.

• A number ending in an odd number of zeroes is never a perfect                     square