Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

What came first, the chicken or the egg?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Can you name an animal whose killing cannot be performed without spilling your own blood?

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

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?

Which digit occurred maximum times between the number 1 and 1000?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?