GATE | GATE CS 2018 | Question 1
What is the missing number in the following sequence?
2, 12, 60, 240, 720, 1440, …. 0
(A) 2880
(B) 1440
(C) 720
(D) 0
Answer: (B)
Explanation: The series starts with 2.
We multiply first term with 6 to get second term 12
Then we multiply second term with 5 to get third term 60
Then we multiply third term with 4 to get fourth term 340
Then we multiply fourth term with 3 to get fifth term 720
Then we multiply fifth term with 2 to get fifth term 1440.
Then we need to multiply with 1 and we get 1440 again.
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Last Updated :
20 Feb, 2018
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