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

If 21x = 79x, what is the value of x?

A sundial has the fewest moving parts of any timepiece. Which has the most?

Solve the puzzle by telling what does below picture means.

Find the Goldfish below the given Image.

I am sure no one can have two things for dinner. what are they?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

What 5-letter word typed in all capital letters can be read the same upside down?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?