90, 99, 45, 106, 90, 63, 18, 81, 36, 18, 45, 90, 36, 90, 72, 18, 81, 81, 63, 18, 99, 54, 99, 63, 45, 45, 99, 90, 45, 72, 90, 18, 63, 54, 27, 45, 63, 18, 99, 54, 36, 99, 81, 27, 72, 99, 36, 54, 18, 99.
Which number is the odd one out? Write down as many reasons as you can think of explaining why that number is the odd one out.
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