Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

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?

What does this rebus riddle mean?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

How many times do a clock's hands overlap in a day ?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable

Who is that with a neck and no head, two arms and no hands? What is it?

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?