Directions to Solve: Look carefully for the pattern, and then choose which pair of numbers comes next.
Explanation:
In this simple addition series, each number is 5 greater than the previous number.
Directions to Solve: Look carefully for the pattern, and then choose which pair of numbers comes next.
Explanation:
In this simple subtraction series, each number is 6 less than the previous number.
Directions to Solve: Look carefully for the pattern, and then choose which pair of numbers comes next.
Explanation:
This is a simple subtraction with repetition series. It begins with 20, which is repeated, then 3 is subtracted, resulting in 17, which is repeated, and so on.
Directions to Solve: Look carefully for the pattern, and then choose which pair of numbers comes next.
Explanation:
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.
Directions to Solve: Look carefully for the pattern, and then choose which pair of numbers comes next.
Explanation:
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.