Logical Problems
Direction: Look carefully for the pattern, and then choose which pair of numbers comes next. Note also that you will be choosing from five options instead of four.
 2 , 3 , 4 , 5 , 6 , 4 , 8

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This is an alternating addition series with a random number, 4, interpolated as every third number.
Correct Option: D
This is an alternating addition series with a random number, 4, interpolated as every third number. In the main series, 1 is added, then 2 is added, then 1, then 2, and so on.
 17 , 17 , 34 , 20 . 20 , 31 , 23

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This is an alternating subtraction series with repetition. There are two different patterns here. In the first, a number repeats itself; then 3 is added to that number to arrive at the next number, which also repeats.
Correct Option: E
This is an alternating subtraction series with repetition. There are two different patterns here. In the first, a number repeats itself; then 3 is added to that number to arrive at the next number, which also repeats. This gives the series 17, 17, 20, 20, 23, and so on. Every third number follows a second pattern, in which 3 is subtracted from each number to arrive at the next : 34, 31, 28.
 Look at this series: 3, 4, 7, 8, 11, 12, . . . . . What number should come next?

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This alternating addition series begins with 3; then 1 is added to give 4;
Correct Option: D
This alternating addition series begins with 3; then 1 is added to give 4; then 3 is added to give 7; then 1 is added, and so on.
 Look at this series: 31, 29, 24, 22, 17, . . . . . What number should come next?

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This is a simple alternating subtraction series,
Correct Option: A
This is a simple alternating subtraction series, which subtracts 2, then 5.
 Look at this series: 21, 9, 21, 11, 21, 13,... What number should come next?

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In this alternating repetition series, the random number 21 is interpolated every other number into an otherwise
Correct Option: C
In this alternating repetition series, the random number 21 is interpolated every other number into an otherwise simple addition series that increases by 2, beginning with the number 9.