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Post by afarlie on Jul 12, 2008 18:51:39 GMT
If 1.05 +0.76 = 2.01
4.70 +0.20 = 5.10
What is the result of 1.10 - 0.25 ?
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Post by Tubeboy on Jul 12, 2008 18:59:31 GMT
Err......0.85?
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Post by Deleted on Jul 12, 2008 18:59:49 GMT
0.85
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Post by yerkes on Jul 12, 2008 19:11:35 GMT
But 1.05 + 0.76 isn't 2.01... - or are we talking base 1.8?  |
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Post by afarlie on Jul 12, 2008 22:02:00 GMT
But 1.05 + 0.76 isn't 2.01... - or are we talking base 1.8? 1.05+0.76 = 2.01 is perfectly valid in one context. |
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Chris M
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Post by Chris M on Jul 12, 2008 22:57:42 GMT
I'm guessing this is something like program machine maths which is base 8? But then the second example wouldn't be possible?
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Post by c5 on Jul 12, 2008 23:13:53 GMT
29?
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Post by Deleted on Jul 13, 2008 1:20:02 GMT
If base 8 then 1.05 + 0.76 = 1.81 = 2.01 (base 8). Then 1.1 - 0.25 (base 8) = 0.90 - 0.25 (base 10) = 0.65. But then 4.90 + 0.20 = 5.10 + 0.20 = 5.30. ?  EDIT: The above was written last night after about 8 hours of drinking, so may well be complete gibberish!
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Post by afarlie on Jul 14, 2008 10:22:35 GMT
Hint: The fractional part may not nessacrily be base 10.
Hint: Consider how the Quail flies......
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Post by Deleted on Jul 14, 2008 12:14:13 GMT
Miles and chains (eightieths of a mile) - so answer is 65 chains (0.65 in the (sub-optimal) way it's written here).
(In base 8, 1.05+0.76 = 2.03)
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Post by Deleted on Jul 14, 2008 16:50:04 GMT
I've just realised that afarlie has modified the first post, so actually what I said above does make sense - if the first decimal place of the fractional part is base 8 then 4.70 + 0.20 = 5.10 and so the result of 1.10 - 0.25 is 0.65.
And etr220's suggestion (which amounts to the same thing, but explained better!) does at least give it a railway context.
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Post by hotelinspector on Jul 14, 2008 18:08:35 GMT
Roding Valley? :-D
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