Question

Draw a line to join each statement to the correct answer.

even + even + even =
even
odd - even - even =
even - odd + odd =
odd
odd + odd + odd =

Answer 1

even+even+even=even

odd-even-even=odd

even-odd+odd=even

odd+odd+odd=odd

Answer 2

even + even + even = even,

odd - even - even = odd

even - odd + odd = even

odd + odd + odd = odd

Explanation:

The answer will be odd if there are an odd number of odd numbers (eg. there are 3 odd numbers in the equation), otherwise, it will be even [for addition/subtraction only]

eg. odd + odd + odd (7+5+3) = 15(odd)

odd + odd + even(7+5+4) = 16(even) <-- [this equation got even number of odd numbers]