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October 22nd, 2009, 07:38 AM  #1 
Member Joined: Oct 2009 Posts: 39 Thanks: 0  What mean s 'negative number is five times bigger'?
Hi! I got such a case: In january medium temp is 10 F, in july it's five times bigger than in january. What is the medium temperature in july? Of course 5(times) x 5 (temperature) gives 25, but 25 is NOT bigger than 5. So, perhaps it should be (+)25. Correct or not? IF it is (+)25 so should it be 5 (temp in january) +25=20 OR 0 (as a starting point for calculation) + 25=25 as medium temp in july? Thank you in advance W 
October 22nd, 2009, 08:24 AM  #2 
Senior Member Joined: Mar 2007 Posts: 428 Thanks: 0  Re: What mean s 'negative number is five times bigger'?
Hint: Where do you live that it might be a negative reading in July? Although not in context, common sense would assume that they are talking about absolute value differences.

October 22nd, 2009, 09:11 AM  #3  
Member Joined: Oct 2009 Posts: 39 Thanks: 0  Re: What mean s 'negative number is five times bigger'? Quote:
Thanks for your remark, it is what I mentioned that even mathematically 25 is NOT bigger than 5. Anyway the point is what means five times bigger when we talk about negative numbers. But is there mathematical rule/theorem it should be as we suggest from common sense. It is mathematical, not logical problem. The second issue is if it should be added to 5 or to zero, as reference level.  

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bigger, negative, number, times 
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