bonanova Posted April 5, 2018 Report Share Posted April 5, 2018 Find a, b, c. ab x ca= abca , a 4-digit number Quote Link to comment Share on other sites More sharing options...
1 rocdocmac Posted April 5, 2018 Report Share Posted April 5, 2018 (edited) Spoiler Answer: a = 2, b = 5, c = 9 2^5*9^2 = 2592 Edited April 5, 2018 by rocdocmac Quote Link to comment Share on other sites More sharing options...
0 BMAD Posted April 5, 2018 Report Share Posted April 5, 2018 I hope there is a nuanced way of solving this besides brute force. Quote Link to comment Share on other sites More sharing options...
0 rocdocmac Posted April 8, 2018 Report Share Posted April 8, 2018 On 4/5/2018 at 10:24 PM, BMAD said: I hope there is a nuanced way of solving this besides brute force. Trust so too! BN ... is there a way to work it out mathematically? I don't think that logarithms will suffice! Quote Link to comment Share on other sites More sharing options...
0 bonanova Posted April 11, 2018 Author Report Share Posted April 11, 2018 Not that I know of. Tables of powers, or spreadsheet where different abc values can be simply typed in, or inspired guesswork? It's not my fav type of puzzle, but some like this type. Quote Link to comment Share on other sites More sharing options...
0 rocdocmac Posted April 13, 2018 Report Share Posted April 13, 2018 Thanks! Quote Link to comment Share on other sites More sharing options...
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bonanova
Find a, b, c.
ab x ca= abca , a 4-digit number
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