A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

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

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

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

Can you name an animal whose killing cannot be performed without spilling your own blood?

Which letter of the alphabet has the most water?

You have two jars of chocolates labelled as P and Q. If you move one chocolate from P to Q, the number of chocolates on B will become twice the number of chocolates in A. If you move one chocolate from Q to P, the number of chocolates in both the jars will become equal.

Can you find out how many chocolates are there in P and Q respectively?

How do you go from 98 to 720 using just one letter?

I am an odd number. Take away a letter and I become even. What number am I?