until we get a Math forum, the math riddles go here
if 22+7 is 41
and 22+5 is 36
what is x?
5x = 19
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23 replies to this topic
#3
bonanova
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Posted 22 September 2007 - 11:17 PM
yeh mon, lay it on us... [it's not octal at least ... but what?]
The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
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#4
unreality
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Posted 23 September 2007 - 12:46 AM
You got the hint (bases)
Any more would be giving it away
Any more would be giving it away
#5
bonanova
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Posted 23 September 2007 - 05:31 AM
There are digits as high as 9, so the basis would have to be 10 or greater.You got the hint (bases)
But you can't go from twenty-something to forty-something by adding 7 with a basis that high.
I'm curious to see how this turns out.
The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell
- Bertrand Russell
#6
brhan
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Posted 23 September 2007 - 02:33 PM
well, looks like base 7:
22+7 is 29 .... (41 in base 7)
22+5 is 27 .... (36 in base 7)
5x = 19.
19 in base 7 is 25 ..... can we say then x=2, (though the positions are transposed)
22+7 is 29 .... (41 in base 7)
22+5 is 27 .... (36 in base 7)
5x = 19.
19 in base 7 is 25 ..... can we say then x=2, (though the positions are transposed)
#7
unreality
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Posted 23 September 2007 - 04:59 PM
You got it brhan! Except x is 5
5(5) = 25
5(5) = 25
#8
brhan
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Posted 23 September 2007 - 10:06 PM
You got it brhan! Except x is 5
5(5) = 25
Ok ... but it would have been better to put the multiplication operator between 5 and x -- b/c otherwise it seems concatenation.
#9
unreality
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Posted 23 September 2007 - 10:55 PM
Ahh you thought it was 5x as in 52 or something? I gotcha. Like an unknown digit as opposed to multiplication. Sorry. How's this?
5•x = 19
or this?
5*x = 19
5•x = 19
or this?
5*x = 19
#10
unreality
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Posted 23 September 2007 - 11:02 PM
NEW PROBLEM
***************
60-(3•x) = 2§
2+x = 10
what is x? and what number does § represent?
***************
60-(3•x) = 2§
2+x = 10
what is x? and what number does § represent?
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