Sealed Solution
How you do it
Look at your numbers do the easiest sum first i.e 1+2=3,you have now done 3 from the envelope.Cross out the numbers once you have used them to make it easier, keep doing this till you have used them all. 5+3=8,6+8=14,9+4=13,7+0=7.Now you should have crossed out all of your numbers,but is there any more ways...
YES!
You can add up: Also:
9+5=14 0+8=8
3+0=3 5+8=13
6+1=7 3+4=7
Another way to complet a group of envelopes is: also:
3+4=7 4+9=13
0+8=8 8+6=14
5+9=14 7+1=8
7+6=13 5+2=7
1+2=3 3+0=3
RULES
rule 1:To make 3 you can only use numbers under three
rule 2:You can not use the numbers twice. e.g INCORRECT 3+0,5+3.CORRECT2+1,5+3.
rule 3:Cross of the numbers once you have used them.Like seen above.
rule 4:Now you should have the perfect answers.