I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

Find the number of squares in the below-given picture.

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

If eleven plus two equals one, what does nine plus five equal?

Next Number in the Series,

5, 16, 49, 104, ?

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

How is the moon similar to a dollar?

What Adam and Eve do not have but the rest of the people have?

Why is the Hole below a Lock?