Hey! So you know the average domino game consists of 28 pieces, from double blank to double six. My boyfriend, who is Cuban, plays a variety of domino that goes from double blank to double nine, thus making the total number of pieces to be 55.
I was thinking that it would be interesting to have a double nine domino myself and I thought of buying two double six sets and tamper with the pieces of one of them so that I add dots to turn them into the missing pieces with 7, 8 and 9.
I randomly figured out a way to do this, probably not the most optimal way, and I asked myself, what would the least possible number of dots to add to the set to have a complete double nine domino set?
EDIT: I'll try to clarify this. You can Google a domino set to know how the pieces look like. The thing is, these are the pieces in a double six set:
00
01 11
02 12 22
03 13 23 33
04 14 24 34 44
05 15 25 35 45 55
06 16 26 36 46 56 66
And these are the pieces that must be added to complete a double nine set:
07 17 27 37 47 57 67 77
08 18 28 38 48 58 68 78 88
09 19 29 39 49 59 69 79 89 99
The idea is to transform a double six set into the missing pieces from the double nine set just by adding dots to those (there's one piece that will be left out because you only need 27), and the problem I suggested is what would the minimum dots to add be?
David S.
08/12/18