If you say my name, I will no longer exist. What am I?

Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.

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.

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

Which is the rope you never skip with?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?

Imagine you are in a room with no windows or doors. How will you get out?

By adding four matchsticks, can you divide the square shown in the picture into two equal parts?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?