IQ Test Labs

Discover your intellectual strengths

puzzles & brain teasers

Lateral thinking

These puzzles involve some novel way of thinking or looking at the problem from an unexpected viewpoint. The term 'lateral thinking' was coined by Edward de Bono to denote a problem-solving style that involves looking at a situation from unexpected angles. Lateral thinking involves a combination of skills and traits, a few of which are creativity, perceptiveness, and the ability to identify and apply new approaches.

Example:

Why do Chinese men eat more rice than Japanese men?

Solution: There are more Chinese men than Japanese men.

1.The Barrel

There is a barrel with no lid and some beer in it. "This barrel is more than half full," said Chuck. "No it's not," say Joe. "It's less than half full." Without any measuring implements and without removing any beer from the barrel, how can they easily determine who is correct?

They must tilt the barrel until the beer reaches the rim of the barrel. If they can see the bottom of the barrel then it is less than half full.



2.Monday

A man rode into town on Monday. He stayed for three nights and then left on Monday. How come?

Monday is the name of his horse.


3.Switches

Three switches outside a windowless room are connected to three light bulbs inside the room. How can you determine which switch is connected to which bulb if you are only allowed to enter the room once?

Switch on the first switch, leave it for a minute, and then switch it off again. Then switch on the second switch and enter the room. The second switch will be connected to the light that is on, the first switch will be connected to the light with the warm bulb, and the third switch will be connected to the light with the cold bulb.