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Duodecimal Digit Product and Number Puzzle (Posted on 2016-06-12) Difficulty: 3 of 5
P(N) denotes the product of the digits of a 2-digit duodecimal (base 12) positive integer N consisting entirely of nonzero digits.

Find all possible values of a positive integer constant C > 1 such that:
N = C*P(N)

No Solution Yet Submitted by K Sengupta    
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Solution Solution | Comment 1 of 2
I realized this could be solved quickly with a program so I wrote one.

Let the digits be X and Y
we require 12X+Y=C*X*Y
or C=(12X+Y)/(X*Y)
where X and Y are each from 1 to 11

solutions in duodecimal:
11 = 11*1*1
12 = 7*1*2
13 = 5*1*3
14 = 4*1*4
16 = 3*1*6
28 = 2*2*8


  Posted by Jer on 2016-06-12 17:51:42
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