Q: Look at this series: 1.5, 2.3, 3.1, 3.9, ... What number should come next?
Solution: In this simple addition series, each number increases by 0.8
Q: Look at this series: 14, 28, 20, 40, 32, 64, ... What number should come next?
Solution: This is an alternating multiplication and subtracting series: First, multiply by 2 and then subtract 8.
Q: Look at this series: 2, 4, 6, 8, 10, ... What number should come next?
Solution: This is a simple addition series. Each number increases by 2.
Q: Look at this series: 201, 202, 204, 207, ... What number should come next?
Solution: In this addition series, 1 is added to the first number; 2 is added to the second number; 3 is added to the third number; 4 is added to the fourth number; and go on.
Q: Look at this series: 544, 509, 474, 439, ... What number should come next?
Solution: This is a simple subtraction series. Each number is 35 less than the previous number.
Q: Look at this series: 80, 10, 70, 15, 60, ... What number should come next?
Solution: This is an alternating addition and subtraction series. In the first pattern, 10 is subtracted from each number to arrive at the next. In the second, 5 is added to each number to arrive at the next.
Q: Look at this series: 2, 6, 18, 54, ... What number should come next?
Solution: This is a simple multiplication series. Each number is 3 times more than the previous number.
Q: Look at this series: 5.2, 4.8, 4.4, 4, ... What number should come next?
Solution: In this simple subtraction series, each number decreases by 0.4.
Q: Look at this series: 1000, 200, 40, ... What number should come next?
Solution: This is a simple division series. Each number is divided by 5.
Q: Look carefully for the pattern, and then choose which pair of numbers comes next. 28 25 5 21 18 5 14
Solution: This is an alternating subtraction series with the interpolation of a random number, 5, as every third number. In the subtraction series, 3 is subtracted, then 4, then 3, and so on.
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