I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

You are a prisoner sentenced to death. The Emperor offers you a chance to live by playing a simple game. He gives you 50 black marbles, 50 white marbles, and 2 empty bowls. He then says, 'Divide these 100 marbles into these 2 bowls. You can divide them any way you like as long as you use all the marbles. Then I will blindfold you and mix the bowls around. You then can choose one bowl and remove ONE marble. If the marble is WHITE you will live, but if the marble is BLACK... you will die.'

How do you divide the marbles up so that you have the greatest probability of choosing a WHITE marble?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

Find the next number in the sequence

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

Find the next number in the series below

21 32 54 87 131 ?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?