In these Brain Teasers and Maths Picture Puzzles, there four group of five numbers. These five numbers are related to each other by some mathematical operations. Do find this hidden relationship to calculate the value of missing number in one of the set of five numbers.Answers to these Missing Number Math Brain Teasers are given at the end. If you come up with different answer, do post it along with your explanation. It will be interesting to know the different view point to solve these puzzles.