What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

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

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

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

What does does this rebus picture means ?

Can you spot the man between the coffee bean in the picture below ?

If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?