What can go through glass without breaking it?

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?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

What brings you down but never up?

What does this say?

XLR8

I have feet, but no legs. Which animal Am I?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

You have two bottles of pills marked with labels A and B. The pills are identical. The doctor has asked you to take one A pill and one B pill daily. You cant take more or less than that.

While taking out the pills one day, you took out one pill from A and by mistake took out two from B. You have no idea which pill is which now.

You cant throw away the expensive pills. What will you do now?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?