Riddle: There is a lamp inside a photography darkroom. When the darkroom door is closed, it is impossible to tell from outside the room whether or not the lamp is on. There are two switches outside the door of the darkroom. One or both of the switches may control the lamp. It also could be that neither of the switches controls the lamp. All you know is that the light bulb is currently off and that the lamp and bulb are in working condition. The darkroom door is closed and once you open the door you cannot touch either of the switches. If you can only open the dark room door one time, how can you tell which switches, if any, control the lamp?
Answer: Turn the first switch on and leave it on for ten minutes. After ten minutes, turn that switch off and turn the second switch on. Open the darkroom door, and lightly (in case it is hot) touch the bulb. If the lamp is on, and the bulb is quite hot, both switches work the lamp. If the lamp is on, and the bulb is cool, the second switch controls the lamp. If the lamp is off, and the bulb is hot, switch one controls the lamp. If the lamp is off, and the bulb is cool, neither switch controls the lamp.
Riddle: I can be created by humans,
But they cannot control me.
I suck on wood, paper and flesh alike.
I can be more of a hindrance than help at times.
To my creators, I seem to be everywhere at once.
What am I?
Riddle: I'm pleasing to the eye A tool for many absent of mind A tapestry of fickle lies Blind to even the most pensive spies I'm often the breeder of fervent lust But I am by far one you shouldn't trust.
What am I?
Riddle: I am the tool, for inspiring many. Buy me in the store, for not much more than a penny. Don't overuse me, or my usefulness will go, what am I? Do you know?
Answer: Take a thin piece of tissue paper and place the tissue paper under the needle before putting the needle in the water. The tissue paper will eventually sink and the needle will remain floating.