16.  


A: 32, B:63
A:16, B:77
A: 48, B: 28
A: 58, B: 86


Answer

 Option

In the first oval, all numbers are multiples of 8, and in the second, they are all multiples of 7.

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17.  


1
3
5
7


Answer

 Option

Reading each pair of numbers as a 2 digit number, they follow the sequence of square numbers from 6 to 9.

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18.  


3
5
7
9


Answer

 Option

Taking the top row of circles, numbers in the central circle equal the sum of the numbers in corresponding segments of the left and right hand circles. In the bottom row, numbers in the central circle equal the difference between numbers in corresponding segments of the left and right hand circles.

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19.  


311
253
312
254


Answer

 Option

Starting at the top left, and moving through the diagram in a Z shape, double each number and add 3 to give the next number along.

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20.  


29
36
45
51


Answer

 Option

Moving to the right, double each number and subtract 3 to give the next number along.

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