I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

Find the next number in the series below

21 32 54 87 131 ?

How far can you walk into the woods?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

What question can you never answer yes to?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

How can you make a TV, a bed, a dog, and a car liquid?