32 = 9, 42 = 16
sqrt(12) is between 3 and 4.
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12
The square root of 135 is 11.61895. The two whole numbers closest would be 11 and 12.
The closest whole number square root is 12, since 12 x 12 = 144. The next closest are 13 x 13 = 169 or 11 x 11 = 121.
The two whole numbers closest to 162 in square root form are 12 and 13.
11 and 12 11² = 121 12² = 144