Best riddles

cleanshort

Always in the past

You will always find me in the past. I can be created in the present, but the future can never taint me. What am I?
History.
80.15 %
61 votes

interviewlogicmath

Crossing the Bridge Puzzle

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?
It is 17 mins. 1 and 2 go first, then 1 comes back. Then 7 and 10 go and 2 comes back. Then 1 and 2 go again, it makes a total of 17 minutes.
80.14 %
48 votes

cleanshort

Black when you buy it

What is black when you buy it, red when you use it, and gray when you throw it away?
Charcoal.
80.00 %
41 votes

cleanshort

I'm white and empty

I don't have eyes, but once I did see. Once I had thoughts, but now I'm white and empty.
Skull.
79.75 %
47 votes

funnylogic

6 afraid of 7

Why is 6 afraid of 7?
Because seven was hungry and 'seven ate nine' (7, 8, 9).
79.75 %
47 votes

cleanfunnyshortwhat am I

Houses

There was a green house. Inside the green house there was a white house. Inside the white house there was a red house. Inside the red house there were lots of babies. What am I?
This is a watermelon.
79.71 %
78 votes

logic

The farmer, the engineer, the physicist, and the mathematician

A farmer challenges an engineer, a physicist, and a mathematician to fence off the largest amount of area using the least amount of fence. The engineer made his fence in a circle and said it was the most efficient. The physicist made a long line and said that the length was infinite. Then he said that fencing half of the Earth was the best. The mathematician laughed at the others and with his design, beat the others. What did he do?
79.60 %
53 votes