Identify the hidden meaning behind this picture?

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?

Can you find the hidden animal in the picture below?

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

Before Mount Everest was discovered, what was the highest mountain in the world?

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

What word is represented by this rebus?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

Can you Find and name the hidden bird in the picture below ?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?