Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

What number should come in place of the question mark below?

Which is heavier: a ton of bricks or a ton of feathers?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?