Show:
2 X
Hard
10x
5x
squares
100

2x7

14


100

7x7

49

100

10x5

50


100

5x2

10

100

2x2

4

200

2x8

16

200

8x8

64

200

10x6

60

200
5x4

20

200

3x3

9

300

2x9

18

300

9x9

81


300

10x7

70

300

5x6

30

300

4x4

16

400

2x11

22

400

9x5

45

400

10x8

80

400

5x7

35


400

5x5

25

500

2x12

24

500

6x8

48


500

10x10

100

500

5x8

40

500

6x6

36