9/20 Dividing by 3/8 means multiplying the number with 8/3. Number x 8/3 x 5/6 = Number x 40/18 = Number x 20/9 = Number divided by 9/20
Multiplying my age by 6 then subtracting 6 produces the same result as subtracting 7 from my age then multiplying by 7. How old am I?
Solve the below puzzle by replacing the question mark with the correct number.
3 6 12
4 8 16
5 10 ?