What would be the next number in the following series? 1 | 5 | 4 | 16 | 14 | 42
Answers
Answered by
13
Answer:
39
Step-by-step explanation:
The correct answer is (A) - 39.
This series advances according to the following rules:
(1) The series progresses by multiplication and subtraction, alternately.
(2) In each step, the value of the number by which the previous interval is subtracted/multiplied- increases by 1.
Therefore, it is recommended to try to figure out which arithmetic function would lead to the next number in the series.
1 x 5 = 5
5 - 1 = 4
4 x 4 =16
16 - 2 =14
14 x 3 =42
The rule involves alternating between multiplication of descending terms beginning with 5 and subtraction of ascending terms beginning with 1. So x5, -1, x4, -2, x3, -3,… Therefore: 42 – 3 = 39.
The answer is 39.
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