You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

What demands an answer, but asks no questions

what does this picture(rebus) riddle means ?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

I look at you, you look at me I raise my right, you raise your left. What am I?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

What do you call a fish without an eye?

What does it mean?