I am creating a game that player randomly draws 25 elements from 0-9 and 4 basic operations +-x/ from the sandbox .e.g. {0,1,4,4,5,5,5,+,-,*,/ ....... } , what require to do is based on that 25 elements form as many equations as you can. for example if there is two 1s and one 2, and one + in your set, you can form 1 + 1 = 2. and they can do 1+1=1+1 if there are four 1s two + .
now my question is what I should care about the proportion of the number and the operators in the sandbox ? in order to make sure the player with that 25 elements they can form certain amount of equations ?
also, is there any unfavourable condition happen ? for example if i give the player with 25 piece with one * and two 0 , i can form use all equation with all number, 123*0=0 342*0=0 , in this case player not allow form equation like that.
thanks for your input if any help.