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Answer : 1
Explanation :
Taking any series of 3 numbers in a straight line in the diagram, their total is always 19.
Working from the top row, add the values in adjacent boxes and put this sum in the box directly below, working towards the centre. Repeat this pattern starting at the bottom row as well.
Answer : 4
Working in rows, from top to bottom, the sum of the digits in each row increases by 2 each time, from 8 to 16.
Answer : 9
Working clockwise around the 3 triangles, the sum of the outer digits in each triangle is written in the centre of the triangle one place clockwise.
Answer : 72
Numbers follow the sequence of Square Numbers, from 1 to 6, multiplying each one by 2.
Answer : 68
As you move down, multiply each number by 2 and subtract 4.
Answer : 2
The sum of the numbers along each side of the triangle is always 15.
Answer : 16
As you move downwards, numbers increase by 3, then 2, then 1, before repeating this pattern.
Answer : 7
The numbers in each row of the diagram add up to 18.
The sum of the 4 digits at the corners of the diagram is 17, as is the sum of the 4 digits in the middle of each side of the diagram.
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