In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

Count the number of triangles in the given picture.

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Can you place three balls such that the equation shown in the picture holds true?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

Imagine you are in a room with no windows or doors. How will you get out?

What has 88 keys?

What goes up but never comes down?