ANs is 8
Sum of 1st and last term = 15
Sum of 2nd and second last = 15
7+? = 15
? = 8
Game Over XXX
I guess you want to say 11 as your answerhint:
6 - 1 = 5, 14 - 9 = 5
6 - 3 = 3, 12 - 9 = 3
7 - 3 = 4, 11 - 7 = 4
If 11 is taken as answer than
1......(add5)......6......(substract3)......3..... (add 4).....7.......(add4)....11....(add1)....12....(su bstract3).....9.....(add5)......14
This doesn't look correct
How do you explain that (add1) in b/w 11 and 12?
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Sorry if I am wrong in guessing from your hint.
I thought Wilmer's hint was quite neat. I was, as he said, a hint, and so hinted towards Adarsh's solution. Small typo, but that is beside the point.
I propose that the number is not 8, instead it is 426/35. There is a perfectly logical sequence which goes 1, 6, 3, 7, 426/35, 12, 9, 14... I challenge you to find it.
(My point is that no, it doesn't matter!)