Hi there! $\displaystyle 6*7=30$ $\displaystyle 7*5=24$ $\displaystyle 4*9=24$ $\displaystyle 8*5=?$ According to the first three relations find $\displaystyle 8*5=?$. Thank you.
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(6-1)x(7-1)=30 (7-1)x(5-1)=24 (4-1)x(9-1)=24 x=multiplication
Originally Posted by GreenMile Hi there! $\displaystyle 6*7=30$ $\displaystyle 7*5=24$ $\displaystyle 4*9=24$ $\displaystyle 8*5=?$ According to the first three relations find $\displaystyle 8*5=?$. Thank you. here is the relation: $\displaystyle a*b = (a - 1)(b - 1)$ EDIT: well geez, thanks a lot Adarsh. I left the problem unanswered so long, but you decided to answer right before i did
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