(i) 1057 has its unit place digit as 7

Hence, it cannot be a perfect square

(ii) 23453 has its unit place digit as 3

Hence, it cannot be a perfect square

(iii) 7928 has its unit place digit as 8

Hence, it cannot be a perfect square

(iv) 222222 has its unit place digit as 2

Hence, it cannot be a perfect square

(v) 64000 has three zeros at the end of it. However, since a perfect square cannot end with odd number of zeroes, it is not a perfect square

(vi) 89722 has its unit place digit as 2

Hence, it cannot be a perfect square

(vii) 222000 has three zeroes at the end of it. And, we know that a perfect square cannot end with odd number of zeroes.

Hence, it is not a perfect square

(viii) 505050 has one zero at the end of it.

And we know that, a perfect square cannot end with odd number of zeroes,

Therefore, it is not a perfect square