NCO Cyber Olympiad Class 5: Questions 1 of 633
» Verbal Reasoning » Series Completion
MCQ▾
Question
What are the next four numbers in the given sequence?
7, 10, 8, 11, 9, 12, ________ ________ ________ ________
Choices
Choice (4)  Response  

a.  10, 13, 11, 14 

b.  13, 18, 15, 20 

c.  15, 20, 17, 22 

d.  21, 18, 23, 20 

Answer
a.
Explanation
 Here given series 7, 10, 8, 11, 9, 12
 It means 7 + 3 =10 and 10 – 2 = 8
 8 + 3 = 11 and 11  2 = 9
 9 + 3 =12 and 12  2 = 10
 10 + 3 =13 and 13  2 = 11
 11 + 3 = 14
 So, here one time 3 added then 2 subtract so this apply alternately and sequence is 7, 10, 8, 11, 9, 12, 10, 13, 11, and 14.
 Alternatively we can pick alternate numbers like 7, 8, 9 (increasing order of 1) and 10, 11, 12 (increasing order of 1 again).