One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Suppose you are sitting in an interview and the interviewee asks you an aptitude question.

You have three buckets with a capacity of 4 litres, 8 litres and 10 litres and you have a large tank of water. Now you have to measure 3 litres of water precisely using those buckets. How will you do it?

What is black when you buy it, red when you use it, and gray when you throw it away?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

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

Solve the equation in the image by looking at the pattern closely.