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It is not possible for five odd numbers to add up to 50 or any even number.
There are no 5 odd numbers that when added together make 30.Two odd numbers added together make an even numberAn odd number plus and even number makes an odd number.From the five odd numbers:Take two of them and add them together getting an even number and four odd numbersAdd another of the odd numbers to this even number and you will have three odd numbersAdd two of these together and you will have one even and one odd number.Finally add these odd and even numbers together and the result will be an odd numberBut 30 is an even number, so cannot be the sum of five (or any odd number of) odd numbers.
Multiply two odd numbers Add an even and an odd Subtract an odd and an even
Can not be done! An odd number of odd numbers will ALWAYS add up to an odd number.