Medium
What will be the unit digit of the square of the number 12798?
What will be the unit digit of the square of the number 12798?
The unit digit of a square depends only on the unit digit of the original number. Since 12798 ends in 8, and 8 x 8 = 64, the square of 12798 will end in 4.
Re-check your working by substituting the answer back into the original question.