Quote:
Originally Posted by electricflyer
The answer is: In each equation you add the two numbers together for the last 2 (or 1) digits in the answer. The first digit (or 2) in each answer is subtracting the two digits in the equation.
For example: 6 + 4 = ( )10. Subtract 6 - 4 = 2 ( ) answer - 210
15 + 3 = ( ) 18 15 - 3 = 12 ( ) Answer 1218
Is that clear as mud?
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Stated somewhat more simply, it's the difference followed by the sum.