85 is an odd number.
82 is not an odd number.
84 is an even number.
For example, numbers such as 11, 23, 35, 47 etc. are odd numbers. All the numbers ending with 0,2,4,6 and 8 are even numbers. For example, numbers such as 14, 26, 32, 40 and 88 are even numbers.
61 is an odd number.
Because it was supposed to fulfill all of Voldemort's wishes, and as Wormtail was in debt to Harry Dumbledore explained at the end of POA), he couldn't kill him, so the hand strangled him as he was forced to be momentarily unfaithful to Voldemort!
Yagura, being the strongest shinobi in his village at that time, was elected as the Fourth Mizukage. Yagura being defeated by Itachi. Before he could continue his efforts, Itachi Uchiha was able to immobilise Yagura with Amaterasu, allowing the Uchiha to escape.