Q: Is 654321 odd or even

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23456 + 654321 = 677,777

Yes it would Even + even = even Even + odd = odd Odd + odd = even

because... odd+odd=even even+odd=odd e.g 1+1+1=3 odd+odd+odd=odd

odd. odd=odd odd+odd=even odd+odd+odd=odd it keeps alternating in that fashion

because that's the theory of maths even x even = even even x odd = odd even + even = even even + odd = odd

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23456 + 654321 = 677,777

Odd. Even + Even = Even Odd + Odd = Even Odd + Even = Even + Odd = Odd

No.

Not sure about a square route, but the square root of 654321 is 808.901 (to 3 dp).

odd * odd = odd answer even * even = even answer odd * even = even answer

even times even = even odd times even = even odd times odd = odd

Yes. Even + Even = Even, Odd + Odd = Even and Even + Odd or Odd + Even = Odd

No. Sum of odd + odd = even Sum of odd + even = odd Sum of even + even = even

Always. even + even = even odd + odd = even even + odd = odd odd + even = odd To summarise, if you add like numbers you get even, otherwise you get odd.

even times even = even odd times even = even odd times odd = odd

it is even

even times even = even odd times odd = odd even times odd = even