12.6 + 3.1 + 5.4 = 21.1
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The sum of the five odd numbers between 10 and 20 is: sum = 5 x (11 + 19) / 2 = 75.
With standard dice, zero.
No number is less than 20 and greater than 40, but if you switch them around, your answer is 25.
43
14, 16, 18 and 16, 18, 20