YES!!!
Any number however large or small, than ends in 1,3,5,7,9 is odd.
Since your example ends in '3' then it is odd.
NB All even numbers end in 0,2,4,6,8
e.g. 1,000,005 is odd , but 0.00006 is even .
You just inspect the last (right hand) number to decide if it is odd or even.
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odd. odd=odd odd+odd=even odd+odd+odd=odd it keeps alternating in that fashion
because... odd+odd=even even+odd=odd e.g 1+1+1=3 odd+odd+odd=odd
431 is an odd number
odd