There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

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?

What does below Rebus mean ?

esgg sgeg gegs gsge

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?

How is a fly different from a mosquito?