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 make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Two friends decide to get together; so they start riding bikes towards each other. They plan to meet halfway. Each is riding at 6 MPH. They live 36 miles apart. One of them has a pet carrier pigeon and it starts flying the instant the friends start traveling. The pigeon flies back and forth at 18 MPH between the 2 friends until the friends meet.

How many miles does the pigeon travel?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Can you write down eight eights so that they add up to one thousand?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209