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

Who are the happiest people in IPL match?

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?

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

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

Solve the mathematical equation in the picture below.