Write the digit in unit’s place when the following number are squared:

4, 5, 9, 24, 17, 76, 34, 52, 33, 2319, 18, 3458, 3453.

We know that if two numbers have same unit place then the unit place of their squares is also same.

4² = 16, unit place of 4² = 6

5² = 25, unit place of 5² = 5

9² = 81, unit place of 9² = 1

24: 4² = 16, unit place of 24² = 6

17: 7² = 49, unit place of 17² = 9

76: 6² = 36, unit place of 76² = 6

34: 4² = 16, unit place of 34² = 6

52: 2² = 4, unit place of 52² = 4

33: 3² = 9, unit place of 33² = 9

2319: 9² = 81, unit place of 2319² = 1

18: 8² = 64, unit place of 18² = 4

3458: 8² = 64, unit place of 3458² = 4

3453: 3² = 9, unit place of 3453² = 9