How to find out the unit digit of square?
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It's simple. You have to find the squares of first 10 numbers.
1² - 1
2² - 4
3² - 9
4² - 16
5²- 25
6²- 36
7²- 49
8²- 64
9²- 81
10²- 100
Now, look at the last digits, we may find the unit digit of square.
Therefore, digits ending with
1&9 have 1
2&8 have 4
3&7 have 9
4&6 have 6
5 have 5
0 have even numbers
1² - 1
2² - 4
3² - 9
4² - 16
5²- 25
6²- 36
7²- 49
8²- 64
9²- 81
10²- 100
Now, look at the last digits, we may find the unit digit of square.
Therefore, digits ending with
1&9 have 1
2&8 have 4
3&7 have 9
4&6 have 6
5 have 5
0 have even numbers
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