Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series.
6, 9, 7, 10, 8, 11, ?

Option 1: 12

Option 2: 9

Option 3: 11

Option 4: 10


Team Careers360 20th Jan, 2024
Answer (1)
Team Careers360 21st Jan, 2024

Correct Answer: 9


Solution : Given:
6, 9, 7, 10, 8, 11, ?

Every alternate number in the series is a consecutive natural number as shown below –
(I) 6 , 9, 7 , 10, 8 , 11, ? →6 + 1 = 7; 7 + 1 = 8; 8 + 1 = 9
(II) 6, 9 , 7, 10 , 8, 11 , ?→9 + 1 = 10; 10 + 1 = 11

So, 9 is the missing number of the series. Hence, the second option is correct.

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