9 ten-thousands is 9*10,000=90,000. 90,000/10 is 9,000, or nine thousands.
I am not 100% positive but from what I remember learning I think the answer you are looking for on the first question is C.
Well, it should be 45 because 1/3 of the game would be 15 and 15+15 is 30 (2/3rds cost), so 15+15+15, 45, would be the full cost of the game
Well the answer would be 120=120 and 68=68