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7 replies to this topic

#1 brhan

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Posted 07 February 2008 - 08:47 PM

Fifty minutes ago if it was four times as many minutes past three o'clock, how many minutes is it to six o'clock?
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#2 bonanova

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Posted 07 February 2008 - 09:20 PM

Fifty minutes ago if it was four times as many minutes past three o'clock, how many minutes is it to six o'clock?

Don't get it.
Four times as many minutes ... compared to what?
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#3 brhan

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Posted 07 February 2008 - 09:35 PM

Don't get it.
Four times as many minutes ... compared to what?


four times as many minutes as between three o'clock "now" (the time being asked for) .... sorry my working was a bit ambiguous, hope now it is clear.
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#4 bonanova

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Posted 07 February 2008 - 09:45 PM

Spoiler for Is this it?

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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
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#5 Jkyle1980

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Posted 08 February 2008 - 03:23 AM

four times as many minutes as between three o'clock "now" (the time being asked for) .... sorry my working was a bit ambiguous, hope now it is clear.


I think he is saying that if it is x minutes past 3:00 right now, then 50 minutes ago it was 4x minutes past 3:00. Is this correct?
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#6 bonanova

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Posted 08 February 2008 - 08:17 AM

I think he is saying that if it is x minutes past 3:00 right now, then 50 minutes ago it was 4x minutes past 3:00. Is this correct?

Well it would be less, not more, right? Why I asked.
But the explanation provided an answer, above.
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- Bertrand Russell

#7 brhan

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Posted 08 February 2008 - 12:24 PM

|------------4xM--------------------------|--------50----------------|-----M----|3:00					now-50			   now	     6:00


That is pretty correct. But M cannot be 16, otherwise we would have

|------------4xM--------------------------|--------50----------------|-------M----|
3:00 --------------------------------- now-50 ----------------- now ---------- 6:00
---------------------------------------- 4:04 --------------------- 4:54 ---------- 5:10
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#8 bonanova

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Posted 08 February 2008 - 12:55 PM

That is pretty correct. But M cannot be 16, otherwise we would have

|------------4xM--------------------------|--------50----------------|-------M----|
3:00 --------------------------------- now-50 ----------------- now ---------- 6:00
---------------------------------------- 4:04 --------------------- 4:54 ---------- 5:10

Sorry - typo. Of course it's 26.

5M+50=180
10M+100=360
M+10=36
M=26

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- Bertrand Russell




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