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    				| 1. | 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» A number can be a perfect square only when it has unit digit among `1,4,9,6,5`. In all the given numbers, the unit digit is not equal to any of digits `1,4,9,6,5`. So, all given numbers are not perfect squares. | |