If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?
You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up. In how many different ways you can climb 10 stairs?
What number should come in place of the question mark below?
What is both possible and impossible at the same time?
A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.†Her best friend thinks she’s lying, but she’s actually correct. How is that possible?
Can you write down eight eights so that they add up to one thousand?
A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?
What does it mean?
If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?
How can you drop a raw egg from a height onto a concrete floor without cracking it?
There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across. How?
The phrase “thinking outside the box” was popularised from the solution to a topographical puzzle involving 9 dots in a box shape.
