Free Download Keith Kay, "BrainStrains Eye-Popping Puzzles"
English | ISBN: 1402721951 | 2004 | 352 pages | PDF | 16 MB
Mind-blowing conundrums that will sharpen your thinking skills. These fascinating, brilliantly colorful puzzles will strain your brain and dazzle you visually. The picture challenges have a trick to fool you: from vivid optical illusions to 3-D effects. Some problems require a little math but before doing the arithmetic, you ll have to figure out the logic underlying the question.
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