How can you make number one disappear by adding something to it?
An express train takes 3 seconds to enter the tunnel which is 1 km long. If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?
Can you identify the hidden rebus in the image below?
What is the centre of gravity?
Can you solve the below algebraic mathematical equation? (J+O+I+N+T)3 = JOINT
A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result. Can you find how bias is the floor in this case?
This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.
Why Aeroplane windows are round?
What work can one never finish?
What can go through glass without breaking it?
Can you identify the famous TV character from the rebus below?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.