A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

What is the below Rebus indicate?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

When we see 2 but call 10?

When is the top of a mountain similar to a savings account?

What makes this number unique: 8,549,176,320?

Alex is stranded on an island covered in forest.
One day, when the wind is blowing from the west, lightning strikes the west end of the island and sets fire to the forest. The fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process.

There are cliffs around the island, so he cannot jump off.

How can the Alex survive the fire? (There are no buckets or any other means to put out the fire)

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?