Three men in a cafe order a meal the total cost of which is $15. They each contribute $5. The waiter takes the money to the chef who recognises the three as friends and asks the waiter to return $5 to the men.

The waiter is not only poor at mathematics but dishonest and instead of going to the trouble of splitting the $5 between the three he simply gives them $1 each and pockets the remaining $2 for himself.

Now, each of the men effectively paid $4, the total paid is therefore $12. Add the $2 in the waiters pocket and this comes to $14. Where has the other $1 gone from the original $15?

Can you tell a 3D object that has just two surfaces?

There is a place where if I stand up straight, I will still be considered sideways.

who is silent in the parliament?

What four weights can be used to balance from 1 to 30 pounds?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

In the four images below, can you find the odd one out?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

What has many teeth, but cannot bite?