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More ways to get Braingle...

4.5, 4.5, 12.5, What?

Series teasers are where you try to complete the sequence of a series of letters, numbers or objects.

 

Puzzle ID:#28194
Fun:*** (2.67)
Difficulty:*** (2.91)
Category:Series
Submitted By:thepianistalex*us***

 

 

 



A teacher got mad at a student, and gave him one last chance to see if he was paying attention. "You'll give me a number and I'll give you one back, and you must find out the rule. You only get five numbers! Once you get one wrong, you will get detention immediately!"

Here is a summary of what the student said and how the teacher replied.

Input 1 , 2 , 3 , 4, 5
Output 4.5, 4.5, 12.5, 8, 8

What is the rule?





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Comments

Chakoteya*en*
Jan 21, 2006

Whoa! Complicated quiz time!
TheEarthling*no*
Jan 22, 2006

Well, I guess I am not that witty student. Very creative, and hard! I would have never thought of that.
Unstumpable*us*
Jan 22, 2006

WOW, nice one, it was hard, but i got it my first try. I guess i wouldn't have a detention.
Celanba*
Jan 22, 2006

Okay, I totally did not get that one.
RainyMysteriaAau*
Jan 22, 2006

Lol, I didn't get it either, and I voted to reject it because it was too trivial for me
wizofaus*au*
Jan 22, 2006

I thought I had the right idea (it seemed obviously to do with counting the letters and dividing by 2), until I saw the hint, which seemed to indicate there was no mathematical relation. If it had said "It isn't really a sequence" I could understand. Good one, otherwise.
WJSMama**
Jan 23, 2006

Good one. I didn't get it. That's one tough teacher!
jajed1127*
Feb 03, 2006

Tricky
miyukina*
Feb 15, 2006

easy...fun...
scallioAus*
May 08, 2007

Great teaser. Why aren't you posting teasers anymore? You have such good ones.



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