2 cannot be a factor of an odd number, 2 must be a factor of an even number.
An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2. There s the same amount of each.
Odd. Even + Even = Even Odd + Odd = Even Odd + Even = Even + Odd = Odd
I do not understand the significance of the word "riddle" in the question, but related to math, non-integers are neither odd nor even. For example, 1.5 and pi are neither even nor odd. 0 is an even number. See "Parity of Zero" in the Related Links for a discussion of why many people mistakenly believe 0 is not even.
odd * odd = odd answer even * even = even answer odd * even = even answer
2 cannot be a factor of an odd number, 2 must be a factor of an even number.
An even number
Even numbers must have 2 amongst their factors; they may have other even numbers amongst their factors. Odd numbers must not; every factor of an odd number must be odd.
An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2. There s the same amount of each.
An even number can be divided by 2 evenly. An odd number will have a remainder of 1 when divided by 2.
Odd. Even + Even = Even Odd + Odd = Even Odd + Even = Even + Odd = Odd
I do not understand the significance of the word "riddle" in the question, but related to math, non-integers are neither odd nor even. For example, 1.5 and pi are neither even nor odd. 0 is an even number. See "Parity of Zero" in the Related Links for a discussion of why many people mistakenly believe 0 is not even.
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.