Aptitude - Odd Man Out and Series - Discussion

Discussion Forum : Odd Man Out and Series - Missing No. (Q.No. 14)
Directions to Solve
Insert the missing number.

14.
3, 7, 6, 5, 9, 3, 12, 1, 15, (....)
18
13
-1
3
Answer: Option
Explanation:

There are two series, beginning respectively with 3 and 7. In one 3 is added and in another 2 is subtracted.

The next number is 1 - 2 = -1.

Discussion:
4 comments Page 1 of 1.

Bvrit said:   6 years ago
3, 7, 6, 5, 9, 3, 12, 1, 15, (....).

Two series:

3, 7.

3+3 = 6.
7-2 = 5.
6+3 = 9.
5-2 = 3.
9+3 = 12.
3-2 = 1.
12+3 = 15.
1-2 = -1.
(3)

DURAI said:   9 years ago
What will be the next number of the sequence 1, 5, 15, 69, ?
(1)

Niharika said:   10 years ago
3, 7, 6, 5, 9, 3, 12, 1, 15, (....).

Two series:

3, 7.

3+3 = 6.
7-2 = 5.
6+3 = 9.
5-2 = 3.
9+3 = 12.
3-2 = 1.
12+3 = 15.
1-2 = -1.
(1)

Dhaval said:   10 years ago
How can we get -1?

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