What is next number in the pattern below:

131 517 192 123 ?

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?

Can you name an animal whose killing cannot be performed without spilling your own blood?

What Time Should the last watch show in the below figure?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Can you fill the blank with the correct number?

6 30 870 756030 _____

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

Which Burger Is Different in below image?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?