Question

if natural number is even , which of the following digits cannot be at one's place
1) 0
2) 6
3) 7
4) 8​

Answer 1

Answer:

7 may be the option....

please check it...✔️

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Answer 2

Answer:

(1). The ones digit in the square of number can be determined if the ones digit of the number is known.

(2). The number of zeros at the end of a perfect square is always even and double the number of zeros at the end of the number

E.g.

Double zero {7002 = 490000} four zero (even)

(3). The square of an even number is always an even number and square of an odd number is always an odd number.

E.g.