ANS:D - QPRS

No answer description is available.

ANS:E - 29 22

This is an alternating repetition series, in which a random number, 61, is interpolated as every third number into an otherwise simple subtraction series. Starting with the second number, 57, each number (except 61) is 7 less than the previous number.

ANS:E - 18 17

This is a simple alternating addition and subtraction series. First, 3 is added, then 1 is subtracted, then 3 is added, 1 subtracted, and so on.

ANS:C - 22 28

This is an alternating repetition series, with a random number, 22, interpolated as every third number into an otherwise simple addition series. In the addition series, 4 is added to each number to arrive at the next number.

ANS:A - 13 4

This is a subtraction series with repetition. Each number repeats itself and then decreases by 9.

ANS:C - 40 25

Here, every other number follows a different pattern. In the first series, 6 is added to each number to arrive at the next. In the second series, 10 is added to each number to arrive at the next.

ANS:E - 65 70

This is an alternating addition series, in which 10 is added, then 5, then 10, and so on.

ANS:C - 26 24

This is an alternating subtraction series in which 2 is subtracted twice, then 3 is subtracted once, then 2 is subtracted twice, and so on.

ANS:E - 34 38

This simple addition series adds 4 to each number to arrive at the next.

ANS:B - 15 12

This is an alternating addition and subtraction series, in which the addition of 4 is alternated with the subtraction of 3.