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Very difficult math challenges

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Easy (49)
Medium (96)
Difficult (31)
Very difficult (9)
Displaying 9 level challenges Very difficult: Remove Filter Challenge 12
Escalator Challenge 101
The Damn Tomatoes Challenge 106
Radigunda Needs Money Challenge 110
The Traveler's Gold Challenge 168
Spinning the Coin Challenge 169
Throwing Dice Challenge 170
The Square Starting at 999 Challenge 189
Fourth power plus four Challenge 191
The boy, the sneakers and the whistles

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