Mental Processing Speed Test: Math Brain Teaser

Here is Math Brain Teaser to test your mental processing speed. You need to think quickly to solve this Math Brain Teaser. In this Brain Teaser, There are four groups of five numbers. Your challenge is to find a relationship among these numbers and then find the value of the missing number which will replace the question mark. So can you find the missing number?

Can you find the missing Number?

Answer of this "Mental Processing Speed Test-Math Brain Teaser", can be viewed by clicking on the answer button. 

The Answer is 90.
Central Number is the sum of upper and lower layer numbers.

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