View Answer & Explanation
In each row of the diagram, the sum of the left and right hand digits, minus the central digit is always 8.
Divide the circle, horizontally and vertically, to give 4 quarters. The sum of the numbers in the segments of each quarter equals 11.
Working through the diagram in rows, and reading each row as a whole number, the diagram represents a subtraction sum : 203 - 7 = 196
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