Question

find the unit place of square of these given numbers also tell the method to.
122
12398​

Answer 1

Given:-

Method:-

The unit digit of square of a number having 'a' at its unit place ends with a×a.

1)For 122

. The unit digit of the square of a number having digit 2 as unit’s place is 1.

∴ Unit digit of the square of number 122 is equal to 1.

For 12398

The unit digit of the square of a number having digit 8 as unit’s place is 9.

∴ Unit digit of the square of number 12398 is equal to 9.