Find the Missing Number: If 1 + 9 + 11 = 1 Then 14 + 11 + 9 = ?

Look at the equations given in the riddle and try to find the logic behind them.


Find the missing number in the last equation below;

If;

1 + 9 + 11 = 1 &

12 + 11 + 9 = 1

Then;

14 + 11 + 9 = ?

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The logic behind the numbers is as follows;

Add the numbers and subtract the digits of the resulting number.

Let\’s test these with the given equations;

1 + 9 + 11 = 21 => 2 – 1 = 1

12 + 11 + 9 = 32 => 3 – 2 =1

Therefore we can find the missing numbers as;

14 + 11 + 9 = 34 => 4 – 3 = 1

Answer = 1

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