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To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

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Perfect Squares 1-40

The perfect squares from 1 to 40.

Number SquaredSquare
1 squared 1
2 squared 4
3 squared 9
4 squared 16
5 squared 25
6 squared 36
7 squared 49
8 squared 64
9 squared 81
10 squared 100
11 squared 121
12 squared 144
13 squared 169
14 squared 196
15 squared 225
16 squared 256
17 squared 289
18 squared 324
19 squared 361
20 squared 400
21 squared 441
22 squared 484
23 squared 529
24 squared 576
25 squared 625
26 squared 676
27 squared 729
28 squared 784
29 squared 841
30 squared 900
31 squared 961
32 squared 1024
33 squared 1089
34 squared 1156
35 squared 1225
36 squared 1296
37 squared 1369
38 squared 1444
39 squared 1521
40 squared 1600
Created by: AMACB