Tip: It's in his notes. If he is present at the end game, he can say it for you.

Solution: 123

This one is a four part riddle (second is broken into two parts):

• My first is in cake, but not in casserole.
  
  • Hint 1: It's being very literal in terms of spelling.
    
  • Hint 2: What letter is in cake but not casserole?
    
  • Solution: K
• My second, third and fourth are human, but forgiveness is divine.
  
  • Hint 1: This is not literal at all. Think about the meaning of the whole sentence.
    
  • Hint 2: The solution is a single word but it is entered as the first letter and then the remaining two letters.
    
  • Hint 3: Think about why someone would need forgiveness.
    
  • Hint 4: This is a paraphrased quote by the poet Alexander Pope.
    
  • Hint 5: "To ___ is human; to forgive, is divine."
    
  • Solution: ERR which is broken into E and RR
• My last, is a question.
  
  • Hint 1: Remember, we're looking for just a single letter.
    
  • Hint 2: Which letter in the English alphabet also sounds like a question when pronounced?
    
  • Solution: Y

Completed Solution: KERRY which is broken into K E RR Y

This is a Caesar cipher in Teng's notes. There two things to look for in there:

• The ciphered text: XliEhqmvepMwJsspmwl
  
• The number of characters to shift it: 4

The developers were tricky in that the shift is backwards instead of forwards. Solve it, and you'll get this: TheAdmiralIsFoolish

For clarity, I'll add spaces: The Admiral Is Foolish

This code is used if Marc, Teng, and Alla are present. All are on the notes pages.

1. Teng's notes right at the top: Kappa _ _ _ _
   
2. Khan's notes about half way down: _ Theta _ _ _
   
3. Marc's notes near the bottom: _ _ Alpha _ _
   
4. Alla's notes near the top: _ _ _ Zeta _
   
5. Khan's notes just above #2: _ _ _ _ Eta

Put them all together in order and you get: Kappa Theta Alpha Zeta Eta