That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

I have some blue and red sock in my drawer. I have a total of 4 socks. I pick 2 socks and the chance that I get a pair of red socks is 1/2.

What is the chance of picking a pair of blue socks?

What does below pictogram mean?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Buy me, smell me or deliver me, I do not change.

Who am I?

How many letters are in the alphabet?

Can you find the missing piece of the Porsche?