Thread: What is the missing number?

What is the number that goes where the question mark is?

{ 1, 6, 3, 7, ?, 12, 9, 14 }

possible numbers: 4, 7, 8, 10, 11, 13

ANs is 8
Sum of 1st and last term = 15

Sum of 2nd and second last = 15

7+? = 15

? = 8

Game Over XXX

Originally Posted by jerick

what is the number that goes where the question mark is?
{ 1, 6, 3, 7, ?, 12, 9, 14 }
possible numbers: 4, 7, 8, 10, 11, 13

hint:
6 - 1 = 5, 14 - 9 = 5
6 - 3 = 3, 12 - 9 = 3
7 - 3 = 4, 11 - 7 = 4

hint:
6 - 1 = 5, 14 - 9 = 5
6 - 3 = 3, 12 - 9 = 3
7 - 3 = 4, 11 - 7 = 4

I guess you want to say 11 as your answer

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?

__________________
Sorry if I am wrong in guessing from your hint.

Hi Adarsh, Wilmer...

Wilmer, shouldn't you have said

7-3=12-?

a bit of a symptom of Adarsh's method though

Well, who cares...EIGHT is the answer

Apologies; not enough coffee...

Well, who cares...11 is the answer

Well I do care and I am sure OP also does...... and if I am not wrong we all in MHF do care to do correct things by currect method.

And No its still 8.
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Sorry for being rude but that statement doesn't suit you.

I say all possibilities suit the pattern, because I found that the pattern rule was that "they are all numbers".

Jokin', the answer should be 8, if the OP could now confirm if the puzzle has been solved ?

Yep, the answer is 8.


Or: (x-1)(x-6)(x-3)(x-7)(x-?)(x-12)(x-9)(x-14)=0

Originally Posted by Archie Meade

Hi Adarsh, Wilmer...

Wilmer, shouldn't you have said

7-3=12-?

a bit of a symptom of Adarsh's method though

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.

Originally Posted by ADARSH

Well I do care and I am sure OP also does...... and if I am not wrong we all in MHF do care to do correct things by currect method.

And No its still 8.
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Sorry for being rude but that statement doesn't suit you.

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!)