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Question

Look carefully for the pattern, and then choose which pair of numbers comes next.

13 29 15 26 17 23 19

Options:
A .  21 23
B .  20 21
C .  20 17
D .  25 27
E .  22 20
Answer: Option B
Here, there are two alternating patterns, with every other number following a different pattern. The first pattern begins with 13 and adds 2 to each number to arrive at the next; the alternating pattern begins with 29 and subtracts 3 each time.

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