# Why is it always 1089

*(This is the reasoning behind Always End With 1089) *

## You will need a little bit of algebra. |
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Represent the number with ABC | ||||||||||||||||||||||||||||||

Reverse this to get CBA | ||||||||||||||||||||||||||||||

Remember that A is Hundreds B
is tens and C is units Take CBA from ABC like this | ||||||||||||||||||||||||||||||

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Now here is the trick: subtract 1 Hundred, and add 9 Tens and 10 Ones (-100, +90, +10 = 0, so won't change answer):
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Last Step: Reverse the answer and add the
two numbers together.
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As predicted the answer was 1089 |