Triangle Puzzle to Test Your Brain

This is a triangle Math Puzzle which will test your brain. In this triangle puzzle, you are shown some numbers inside and outside the triangle. In each of the triangles, these numbers relate to each other with some logical or mathematical pattern. Your challenge is to crack this hidden code which binds the numbers in the triangles. Once you are able to crack this code, find the missing number in the triangle.

What Number will replace Question Mark?

The answer to this "Triangle Puzzle to Test Your Brain", can be viewed by clicking on the answer button.

The Answer is 8

Let's mark the outer numbers of the triangle as A, B and C starting from the top and then going clockwise. So the central number (D) can be obtained as below

D=(AxC)-B  

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