FMM7
From charlesreid1
Friday Morning Math Problem
Sharing Dump Trucks
Three neighboring construction sites are sharing dump trucks (due to an equipment shortage).
The first site lends the second and third as many dump trucks as they each already had. A few months later, the second lent the first and third as many dump trucks as they each had. Still later, the third lent the first and second as many as they each already had. Each construction site now had 24 dump trucks.
How many dump trucks did each site originally have?
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Solve the problem backwards:
First / Second / Third 24 + 24 + 24 = 72 12 + 12 + 48 = 72 6 + 42 + 24 = 72 39 + 21 + 12 = 72Last line is the answer. |
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Friday Morning Math Problems weekly math problems
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