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Question : Directions: Which number will replace the question mark (?) in the following series
17, 51, 58, 116, 123, 123, ?

Option 1: 150

Option 2: 130

Option 3: 140

Option 4: 120


Team Careers360 25th Jan, 2024
Answer (1)
Team Careers360 27th Jan, 2024

Correct Answer: 130


Solution : Given:
17, 51, 58, 116, 123, 123, ?

Multiply the decreasing order of the numbers starting from 3, and add 7 alternately to the given numbers –
17 × 3 = 51; 51 + 7 = 58; 58 × 2 = 116; 116 + 7 = 123; 123 × 1 = 123; 123 + 7 = 130

So, 130 is the missing number of the series. Hence, the second option is correct.

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