The more it dries, the wetter it becomes. Can you tell what it is?

Replace the question mark with the correct number below.

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Sally lives in a place where six months of the year is mild summer and the temperature drops significantly the other six months. She owns a lake where there is a small island. She wants to build a house on the island and needs to get materials there. She doesn’t have a boat, plane, or anything to transport them to the island. How does Sally solve this problem?

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?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

What am I?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

If eleven plus two equals one, what does nine plus five equal?

There is a number which when you multiply by 3 and subtract 2 from the result, then the resulting number is the reverse of the actual number.

What is the smallest number that stands true on the statement?