When we see 2 but call 10?
How can you tell a raw egg from a hard-boiled egg?
If, A + B = C D - C = A E - B = C Based on the above equations, find out the answer for: D + F = ?
You knock a Table over in the library, and suddenly 20 eyes are looking at you.
Why is the Hole below a Lock?
Solve the mathematical equation in the picture below.
Can you tell a 3D object that has just two surfaces?
What word is identified by the below rebus? Your Your Your Your Your Your Your Your Your Your
I am a prime number. The double of myself is equal to the square of me. which number am I?
I have branches, but no fruit, trunk or leaves. What am I?
This is a classy optical illusion puzzle. What more you can find except bricks in the image below?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
