Numbers ending in 1, 3, 5, 7 or 9 are considered odd numbers.
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If by 'perfect number' you mean 'perfect SQUARE', then yes. 49 is an odd number and a perfect square.
11 - if you mean lowest 2 digit odd number, as 10 is even.
If you mean: 280,647 then it is an odd number
An odd number minus an odd number is an even number.
it is an odd number