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?

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?

What 5-letter word typed in all capital letters can be read the same upside down?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

What word begins and ends with an E, but has only one letter?

What does below Rebus mean ?

esgg sgeg gegs gsge

Keyboard words are not in alphabetical order, Why?