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**sankari****Member**- Registered: 2006-12-06
- Posts: 3

Find next no. in the series: 3,10,7,12,-,9,16

A. 14

B. 11

C. 13

D. 12

pl. help

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**Toast****Real Member**- Registered: 2006-10-08
- Posts: 1,321

uh, is that '-,9' just supposed to be a '-9'?

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**LQ****Real Member**- Registered: 2006-12-04
- Posts: 1,285

1. 3+4 = 7

2. 10+2 = 12

3. 7+2= 9

4. 12+4=16

5. 9+n=q

n=/=2, else no pattern.

n=2r

n can only be 4

q=13

answer = C.

next numbers: 18, 15, 22, 19, 24, 21, 28, 25 etc.

I see clearly now, the universe have the black dots, Thus I am on my way of inventing this remedy...

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**sankari****Member**- Registered: 2006-12-06
- Posts: 3

3,10,7,12, **?** 9,16

What is the number between 12 and 9

Options:

A 11

B 12

c 13

D 14

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**LQ****Real Member**- Registered: 2006-12-04
- Posts: 1,285

Delta n >= 2

Answer = 14.

I see clearly now, the universe have the black dots, Thus I am on my way of inventing this remedy...

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**soha****Real Member**- Registered: 2006-07-07
- Posts: 2,530

ans 13

"Let us realize that: the privilege to work is a gift, the power to work is a blessing, the love of work is success!"

- David O. McKay

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**LQ****Real Member**- Registered: 2006-12-04
- Posts: 1,285

Plz explain

has this serie got something to do with triangles?

*Last edited by LQ (2006-12-07 21:50:26)*

I see clearly now, the universe have the black dots, Thus I am on my way of inventing this remedy...

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**soha****Real Member**- Registered: 2006-07-07
- Posts: 2,530

even i didnt understand

"Let us realize that: the privilege to work is a gift, the power to work is a blessing, the love of work is success!"

- David O. McKay

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**sankari****Member**- Registered: 2006-12-06
- Posts: 3

I'm confused.... which is right?

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**numen****Member**- Registered: 2006-05-03
- Posts: 115

check this out:

http://www.research.att.com/~njas/seque … &go=Search

The only matching (integer) sequence would be the first of the three, none of the other are followed by either 11,12,13 or 14. But then, the rest are still wrong... If it really is a sequence (can't see it myself), nice find.

Bang postponed. Not big enough. Reboot.

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**LQ****Real Member**- Registered: 2006-12-04
- Posts: 1,285

3,10,7,12,14,9,16

number of odds = u

the space between u and next u can be either 2^(u-1), or some other chaotic system.

Note: u would work.

Guess number of even in a row is the total number of odd numbers. Possibly.

Can we make the asumption that the serie beginns with 3 for real?

Anyway, let's say that space between odd numbers = 2^(u-1). Then what is even numbers + odd numbers as a function of u when the n:th number is odd?

even numbers + odd numbers = n

F(2^(u-1)) + log2(2^(u-1)) + 1 = n

F(e^(ln(2)*(u-1))) + u-1 + 1 = n

e^(qln(2))/ln(2) + (u-1) + 1 = n

How do you get u?

Is it possible that the function is imaginary instead?

*Last edited by LQ (2006-12-09 01:16:20)*

I see clearly now, the universe have the black dots, Thus I am on my way of inventing this remedy...

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