Show:
fast facts



hard problems

hardest problems
100

18x2

36

100

47x2

94

100

e=

mc2

200

10x36

360


200

32x2

64

200

10x100

1000

300

2x2

4

300

45x3

135

300

10000000x2

20000000

400

12x12

144

400

34x2

68

500

36x2

72

500

50x3

150