That attorney is my brother, testified the accountant.

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

Who is lying?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Can you place three balls such that the equation shown in the picture holds true?

What two things can you never eat for breakfast?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

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 branches, but no fruit, trunk or leaves. What am I?

There is a certain crime, that if it is attempted, is punishable, but if it is committed, is not punishable. What is the crime?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.