A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

Prove that the below maths equation is true.

8 + 8 = 91

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

A man dies of old age on his 25 birthday. How is this possible?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

What does an Island and the letter T have in common?

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?