Table from Encarta

Squares, Cubes, and Roots

No. Square Cube Square root Cube root
1 1 1 1.000 1.000
2 4 8 1.414 1.260
3 9 27 1.732 1.442
4 16 64 2.000 1.587
5 25 125 2.236 1.710
6 36 216 2.449 1.817
7 49 343 2.646 1.913
8 64 512 2.828 2.000
9 81 729 3.000 2.080
10 100 1000 3.162 2.154
11 121 1331 3.317 2.224
12 144 1728 3.464 2.289
13 169 2197 3.606 2.351
14 196 2744 3.742 2.410
15 225 3375 3.873 2.466
16 256 4096 4.000 2.520
17 289 4913 4.123 2.571
18 324 5832 4.243 2.621
19 361 6859 4.359 2.668
20 400 8000 4.472 2.714
25 625 15625 5.000 2.924
30 900 27000 5.477 3.107
40 1600 64000 6.325 3.420
50 2500 125000 7.071 3.684
Appears in these articles:
Power (mathematics); Root (mathematics)
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