Please help on number 8 I’ll give points

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible