Hm.. That's a hard one is the answer..10??
Answer:
4-6 is 2 and 3-7 is 4
Step-by-step explanation:
gufu6hrhjgbycjjjsidnidjdudjeijwjseyfhjokjo
The first digit may be 1 or 8.
The second digit may be 1, 2, 4, 8.
The third digit may be 1, 3, 5, 7, 9.
There are 
The probability that this is the correct code is 
Use google and get some ideas. Also look up some non famous scientists and get some info about them