Answer:
the square of 431 and 7779 are ODD numbers
Explanation:
431² = 185,767 ODD
2826² = 7,986,276 EVEN
7779² = 60,512,841 ODD
82004² = 6,724,656,016 EVEN
Easier way to figure this out, if the number is ODD to begin with, then the square of that number is also ODD