Question
Download Solution PDFWhat should come in place of question Mark ‘?’ in the following number series?
15, 34, 57, 86, ?, 170
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
15, 34, 57, 86, ?, 170
Solution:
34 - 15 = 19
57 - 34 = 23
86 - 57 = 29
123 - 86 = 37
170 - 123 = 47
∴ Missing term in the series is 123.
Important Points
The difference in the numbers 19, 23, 29, 37 & 47 are multiple of 2.
⇒ 23 - 19 = 4
⇒ 29 - 23 = 6
⇒ 37 - 29 = 8
⇒ 47 - 37 = 10
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