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?

You can hear me, but you can't touch or see me.

What am I?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

My location can be determined by the below rebus.
So where am i ?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

What time is it when an elephant sits on a fence?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?