There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

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.

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?

If 1+9+8=1, what is 2+8+9?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

A bomb exploded in a room full of married couples and no one died. How?

What does this rebus means ?

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