what, still unclear?
1. 360 = 5 * 2^3 * 3^2
So, he got 5 raises: 2,2,2,3,3 times
2. 3 times. before the last raise (of 3 times), his salary was 5*8*3 = 120
so, his raise was another 240, making his final salary of 360
3. 5 (5*2 = 10, 5 more than his starting salary) 5*2^5 = 160
4. well, it would be 9/5 as much, right?