Erythrocytes as they are to do with red blood cells. The other three are to do with white blood cells
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
Odd. Even + Even = Even Odd + Odd = Even Odd + Even = Even + Odd = Odd
27 is an odd number.
49 is an odd number numbers ending in 1,3,5,7,9 are odd.
23 is an odd number.
431 is an odd number
odd
37
It is odd.
odd
odd.