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?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

Can you find out who is the kidnapper in below Picture and why, Explain ?

Find the next number in the following series:
6, 14, 26, 98, __?

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?

What can go up a chimney down, but can’t go down a chimney up?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Can you count the number of triangles in the given figure?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

What number divided by 4 is the same as that number minus 4?