There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

Mr Black, Mr Gray, and Mr White are fighting in a truel. They each get a gun and take turns shooting at each other until only one person is left. Mr Black, who hits his shot 1/3 of the time, gets to shoot first. Mr Gray, who hits his shot 2/3 of the time, gets to shoot next, assuming he is still alive. Mr White, who hits his shot all the time, shoots next, assuming he is also alive. The cycle repeats. If you are Mr Black, where should you shoot first for the highest chance of survival?

If 21x = 79x, what is the value of x?

You have 21 jars with you. Out of them, 7 are filled with water, 7 are half-full with water and 7 are empty. How will you distribute the jars among three people such that each one of them gets an equal number of jars and an equal amount of water?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Can you find out the number that should replace the question mark with a valid reason?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Can you place six X (crosses) in below board without making three in a row in any way ?

They are three errirs in this question. Can you find them?