# REPLY: Re: [Maths-Education] Cryptic QAA problem.

**Paul Ernest**
P.Ernest@exeter.ac.uk

*Thu, 2 Nov 2000 17:57:57 +0000 (GMT Standard Time)*

Ahh. Now you've spoiled it.
Hint: see subject and last question.
>* On Thu, 2 Nov 2000, Paul Ernest wrote:
*>* > Think of a number between 1-24. Call it X. Add 7. Double
*>* > it. Multiply by three. Add 200. subtract 98. Divide by 6.
*>* > Subtract X. What's the answer? Understand?
*>*
*>* Have I missed the thread here? Is this an answer or a question?
*>*
*>* The answer appears to be 24 every time.
*>* [(6(x+7) + 102)/6 - x => x+7 + 17 -x => 24]
*>*
*>* I don't know why it says only pick numbers from 1-24: is this meant to be
*>* grounded in reality?
*>*
*>* Scott
*>*
*>*
*>* Scott Keir
*>* Maths Year 2000 Scotland
*>* International Centre for Mathematical Sciences P: 0131 220 1777
*>* 14 India Street F: 0131 220 1053
*>* Edinburgh e: scottk@mathsyear2000scotland.org.uk
*>* EH3 6EZ w: http://www.mathsyear2000scotland.org.uk
*
Paul
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