Question

If a number has 1 or 9 in the unit’s place, then it’s square ends in ________. ________ is the inverse operation of square. All square numbers end with __________ at unit’s place. If a number has 2 or 8 in the unit’s place, then it’s square ends in ______. ​

Answer 1

1,-,-,4 .2nd and 3rd I don't know