What happened when the wheel was invented?
Here is a mathematical expression that also secretly tells a movie name. What movie is that?
In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.
First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?
A container contains 100 eggs. They can be either fresh or rotten. What is sure is the fact that there is at least one fresh egg in that container. If you are asked to pick two eggs randomly from the container, at least one of them will be rotten. Can you calculate how many eggs in that container are fresh?
Can you find the 09 errors in the picture below?
John is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not. Is a married person looking at an unmarried person ?
I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?
12345 a famous South Indian actor 567 is a path in jumbled form 8 & 10 are same letters 9 is one among the first six alphabets. WHO AM I?
What part of the chicken has the most feathers?
I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.