Answer:
241
Explanation:
Simplify the following: 
2^8 - 10 - 15/3 
 
The gcd of -15 and 3 is 3, so (-15)/3 = (3 (-5))/(3×1) = 3/3×-5 = -5: 
2^8 - 10 + -5 
 
2^8 = (2^4)^2 = ((2^2)^2)^2: 
((2^2)^2)^2 - 10 - 5 
 
2^2 = 4: 
(4^2)^2 - 10 - 5 
 
4^2 = 16: 
16^2 - 10 - 5 
 
 | 1 | 6 
× | 1 | 6 
 | 9 | 6 
1 | 6 | 0 
2 | 5 | 6: 
256 - 10 - 5 
 
256 - 10 - 5 = 256 - (10 + 5): 
256 - (10 + 5) 
 
10 + 5 = 15: 
256 - 15 
 
 | 2 | 5 | 6 
- | | 1 | 5 
 | 2 | 4 | 1: 
Answer: 241