Medium
What will be the unit digit of the square of the number 12798?
Explanation
Explanation
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.
PRO TIP
Re-check your working by substituting the answer back into the original question.