Line 120: cout << "Your Total Score is " << Total << " out of 100" < endl;
change to: cout << "Your Total Score is " << Total << " out of 100" << endl;
(Another typo)
Line 164: cin >> Guess;
164:9: error: 'Guess' was not declared in this scope
Perhaps you wish to do:
1 2
int Guess;
cin >> Guess;
In general, read the compile errors closely, because they will contain line numbers close to where the actual error is. Typos are usually easy to spot once you know where to look.