Read many objective multiple choice questions of Aptitude - Aptitude-Number series in English. Practise online thousands of questions related to Aptitude - Aptitude-Number series. You can check online answer and try mock tests for Aptitude - Aptitude-Number series Questions provided in English.
18 21 25 18 29 33 18
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This is a simple addition series with a random number, 18, interpolated as every third number. In the series, 4 is added to each number except 18, to arrive at the next number.
84 78 72 66 60 54 48
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In this simple subtraction series, each number is 6 less than the previous number.
61 57 50 61 43 36 61
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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.
20 20 17 17 14 14 11
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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.
17 17 34 20 20 31 23
OOPS, your answer is incorrect
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.
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