Replace the question mark with the correct number below.

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

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

Who is that with a neck and no head, two arms and no hands? What is it?

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Peter wakes up daily to pick up his cycle and crosses the border between Spain and France daily with a bag on his shoulder. He is investigated daily by the officials but they don't find anything suspicious.

If we tell you that he is smuggling something what would it be?

A crime was committed at baker street. Ibrahim Dakota who was shot in the stomach was the main suspect. Sherlock questioned the suspect. The conversation started as:
Sherlock: What's your story, Ibrahim?
Ibrahim: I was walking around baker street and suddenly a man from the back shot me. I ran as fast as I could to save my life".
Sherlock: That is enough (and ask the police to arrest him).

Why does Sherlock think he is the murderer?

Why is it against the law for a man living in Delhi to be buried in Mumbai?