IQ Riddles

IQ Riddles are riddles that test your IQ. They are usually in the form of a logic riddle.

Half Full Recycling Bin

There is a bottle recycling bin, with one lonely bottle inside. Every hour, on the hour, people come and put bottles into the skip. The first hour, at noon, one person came and put a bottle in. One hour later, two people placed a bottle each into the skip. An hour later four people placed a bottle each into the skip.

This doubling of people continued until 11pm, when the bin was finally full. When was the bin exactly half full?

Riddle Answer

Mute Person Toothbrush

A mute person goes into a shop and wants to buy a toothbrush. By imitating the action of brushing his teeth he successfully expresses himself to the shopkeeper and the purchase is completed.

Next, a blind man comes into the shop who wants to buy a pair of sunglasses; how does he indicate what he wants?

Riddle Answer