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3, 7, 6, 5, 9, 3, 12, 1, 15, ?5
Q: 3, 7, 6, 5, 9, 3, 12, 1, 15, ?
- 118false
- 213false
- 3-1true
- 43false
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Answer : 3. "-1"
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.