What is in seasons, seconds, centuries and minutes but not in decades, years or days?

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 find the six hidden animals in the picture below?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Count the number of balls in picture below:

Which is the smallest number that you can write using all the vowels exactly once?

Take one out and scratch my head, I am now black but once was red. What am I?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Can you count the number of lines in the below picture?