[GitHub]
Score:
0
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0
0
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0
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=
✓
✗
−
7
8
9
⌫
4
5
6
C
1
2
3
0
ENTER
RESTART
SETTINGS
Easy (add/sub to 10, multiply to 5)
Medium (add/sub to 15, multiply to 8)
Hard (add/sub to 20, multiply to 10)