BrainTwister #40: There are four lights
Regulars
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Puzzles
BrainTwister #39: Game of logic
Regulars
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BrainTwister #38: Rotating dice
Regulars
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BrainTwister #37: Digital multiplication
Regulars
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BrainTwister #36: Prime generators
Regulars
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BrainTwister #35: Cube cuts
Regulars
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BrainTwister #34: Square dealing
Regulars
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BrainTwister #33: Number triangles
Regulars
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BrainTwister #32: Crossed out of order
Regulars
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BrainTwister #31: Fold and cut
Regulars
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BrainTwister #30: Digital targets
Regulars
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BrainTwister #29: Four by four
Regulars
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