yes, anything that cant be divided by 2 is an odd number.
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215 is divisble by 1, 5, 43 and 215.
odd
An odd number times an odd number is an odd number no matter which 2 odds you multiply.
(150 + 280) ÷ 2 = 215
If the last number is odd or even then the whole number is odd or even, in this case the last number is 3 which is an odd number, therefore the whole number is odd.