## People can’t survive without it

What is invisible and makes people suffer from symptoms like sweating and nausea, yet people can’t survive without it?
Love.
75.81 %
logic

## Running a race

If you were running a race, and you passed the person in 2nd place, what place would you be in now?
You would be in 2nd. Well, you passed the person in second place, not first.
74.97 %

## King's riddle

Bertrand knew the answer because Cecil didn't say anything after one minute. If Bertrand and Allan's hats were both the same color, then Cecil would know what color his hat was. But Cecil didn't know. So Bertrand knew that Allan's hat was a different color than his. Since Allan's hat was black, Betrand knew his hat was white.
74.08 %

## Cruising along

You see a boat filled with people. It has not sunk, but when you look again you don't see a single person on the boat. Why?
All the people were married.
73.90 %

## Lost

What can you lose that will cause other people to lose theirs too?
73.74 %

## Higher than a building

What jumps higher than a building?
All animals and people can jump higher than a building. Buildings do not jump.
73.50 %

## Quick bridge-crossing

Four people come to an old bridge in the middle of the night. The bridge is rickety and can only support 2 people at a time. The people have one flashlight, which needs to be held by any group crossing the bridge because of how dark it is. Each person can cross the bridge at a different rate: one person takes 1 minute, one person takes 2 minutes, one takes 5 minutes, and the one person takes 10 minutes. If two people are crossing the bridge together, it will take both of them the time that it takes the slower person to cross. Unfortunately, there are only 17 minutes worth of batteries left in the flashlight. How can the four travellers cross the bridge before time runs out?
The two keys here are: You want the two slowest people to cross together to consolidate their slow crossing times. You want to make sure the faster people are set up in order to bring the flashlight back quickly after the slow people cross. So the order is: 1-minute and 2-minute cross (2 minute elapsed) 1-minute comes back (3 minutes elapsed) 5-minute and 10-minute cross (13 minutes elapsed) 2-minute comes back (15 minutes elapsed) 1-minute and 2-minute cross (17 minutes elapsed)
73.12 %

## Similarity between a bottle and a human being

What is the similarity between a bottle and a human being?
Both have necks.
72.83 %

## An apple

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?
Place the apple on one person's head.
72.48 %