Recent content by crawler666

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    Source: Sterling, Brain Teasers, p. 30

    Question 1. How bout just smashing the bottle
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    Find Out Which Switch Turns On Light Bulb Brain Teaser

    As far as i recall the person outside must flick a switch. Then wait a bit. Then he/she goes in. If the bulb is off and cold the switch flicked before entering is a dud. If the bulb is on, well its obvious. Something like that anyway.