41.  


7
9
11
15


Answer

 Option

Split the left and right hand circles in half, vertically. The sum of the numbers in the left hand half of the left circle appears in the top left hand segment of the middle circle, and the sum of the numbers in the right hand half of the left hand circle appears in the bottom left hand segment of the middle circle. Repeat this pattern for the right hand circle.

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42.  


5
7
9
11


Answer

 Option

In each diagram, the sum of the upper left and upper middle numbers is written in the centre box, and the sum of the upper right and upper middle numbers is written in the lower central box.

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43.  


4
5
6
7


Answer

 Option

The number at the centre of each segment equals the sum of the numbers on the outside of the opposite segment.

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44.  


19
21
23
25


Answer

 Option

Looking at the diagram as two columns, numbers in the left hand column increase by 5, 6, 7 etc, and numbers in the right hand column increase by 6, 7, 8 etc.

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45.  


4
5
6
7


Answer

 Option

The numbers in the lower circles equal the numbers in corresponding segments in the upper circles multiplied by two, then subtract 3 for the left hand circle, 4 for the middle and 5 for the right hand circle.

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