what does the below rebus means?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

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

You need to move three matchsticks to form three squares. Can you do it?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

John is on an island and there are three crates of fruit that have washed up in front of him. One crate contains only apples. One crate contains only oranges. The other crate contains both apples and oranges.

Each crate is labelled. One reads 'apples', one reads 'oranges', and one reads 'apples and oranges'. He know that NONE of the crates have been labeled correctly - they are all wrong.

If he can only take out and look at just one of the pieces of fruit from just one of the crates, how can he label all of the crates correctly?

A horse was tied to a rope 5 meters long and the horses food was 15 meters away from the horse. How did the horse reach the food?

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?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?