The square of which of the following numbers would be an old number?
(i) 731 (ii) 3456
(iii)5559 (iv) 42008
Square of an odd number is an odd number
Square of an even number is an even number
(i) 731: It is an odd number so its square is also odd number
(ii) 3456: It is an even number so its square is also even number
(iii) 5559: It is an odd number so its square is also odd number
(iv) 42008: It is an even number so its square is also even number
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