Brainteasing
I once got tripped up by a particularly diabolical "you'll feel stupid if you don't figure it out"-type brainteaser once. My dad showed it to me in a magazine. There was this Venn diagram, two overlapping circles, containing three sets of numbers, something like this:
You had to figure out the property shared by the numbers in each circle (the numbers inside the overlap, of course, had both properties).
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____ ___
/ \ / \
/ 6 /\ 156 \
/ 4884 / \ 713 \
| 1771 | 535 | 278 |
| 29592 | 707 | 350 |
| 33 | 474 | 904 |
| 98089 | 212 | 127 |
\ 64046 \ / 209 /
\ 7227 \/ 384 /
\____/ \___/
You had to figure out the property shared by the numbers in each circle (the numbers inside the overlap, of course, had both properties).
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