well G has to be less than or equal to 3 - as 3G < 9
and it cant equal 0 as then Z would equal Zero.
3 numbers multiplied between 0 and 9 whoms answer is greater then 10 there are only 4 and 7 you can use (12 and 21) there is no 3 answer so g has to equal 2 or 3 and it just goes on from there,
i tried bopth 4 and 7 and only one fo them works
