There are forty elephants and they have forty-fore heads. How can this be possible?

Can you solve this picture maths equation?

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

Why do we preferably have round manhole covers and not square ones?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

Why Wine Glass Stem is so long?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

John was piloting a plane behind a car but was never able to overtake it. Why?

I am the fastest animal but cannot climb the tree. What am I?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.