Which of the following number(s) is a perfect square(s)? select all that apply.

25
2
81
1
5
11
144
45
400
36
225
4
9

To find if they are perfect squares, find the square root of each number, if it is a whole number ( no decimal) it is a perfect square, if it contains a decimal it is not.

25  : √25 = 5   YES

2 : √2 = 1.414  NO

81 : √81 = 9  YES

1 : √1 = 1 YES

5 : √5 = 2.23  NO

11 : √11 = 3.31  NO

144 : √144 = 12  YES

45 : √45 = 6.70  NO

400 : √400 = 20  YES

36 : √36 = 6  YES

225 : √225 = 15  YES

4 : √4 = 2  YES

9: √9 = 3  YES

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