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Math Logic Puzzles: Mind Puzzles for Teens: Ripple Effect Puzzles - 200 Brain Puzzles with Answers (Paperback)
We have something new for you with Mind Puzzles for Teens a great way for you to spend a few hours in deep concentration working out complex and fun puzzles and conundrums. Ripple Effect - is a logic puzzle published by Nikoli. The puzzle consists...
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