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Mathematical block problem
(1): first floor 1, (2): * *1+4+9+16+25+36+49+64+81+.

4 The second floor, or1*10+3 * 9+5 * 8+7+9 * 6+1* 5+13 * 4+15 * 3+66.

Nine are on the third floor,

The fourth layer has 16, (3): the nth layer has n squares.

25 on the fifth floor,

No.36, sixth floor,

49 on the seventh floor,

64 is on the eighth floor,

9/f 8 1,

10th floor 100.