7-22-13. It is a substitution cryptogram in which letters are substituted for numbers. For example, 7 = t, 22 = e and 13 = n.
The Puzzle: Here is a famous prize problem that Sam Loyd issued in 1882, offering $1000 as a prize for the best answer showing how to arrange the seven figures and the eight 'dots' .4.5.6.7.8.9.0. which would add up to 82.
If 1,4,3=13; 4,5,4=9; 5,6,5=11 and 7,7,6=7 then 9,8,7=?