NO!!!
'18' is EVEN because it ends in '8'
'81' is ODD because it ends in '1'/
However, both numbers are multiples of '9'.
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The sum of the first nine odd numbers is 81.
yes 9 25 49 81 121 All odd numbers squared are odd numbers
no because 81 is an odd number. only even numbers are divisible by 2 evenly.
25 (25+27+29=81)
25, 27, 29