Harshit Singh
Last Activity: 3 Years ago
Dear Student
The unit digit of square of a number having 'a' at its unit place ends with a×a.
i.The unit digit of the square of a number having digit 1 as unit’s place is1.∴ Unit digit of the square of number 81 is equal to 1.
ii. The unit digitof the square of a number having digit 2 as unit’s place is4.∴ Unit digit of the square of number 272 is equal to 4.
Thanks