A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Who has married many women but was never married?

There is so small cabin inside a deep forest.
All the forest burned out to worst possible but the inside of the cabin is still the same.
However all the person inside the cabin die.

How come ?

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Can you find out the missing number in the grid?

What kind of band never plays music?

Can you solve the below geography rebus by decoding the below rebus ?