Question 1071346: Mrs Collins is buying birthday presents for her twins.Peter wants model train kits and Paul wants stamps for his collection. Mrs Collins has decide to spend exactly the same amount of money on each of the boys . if the model trains are $8.75 and the stamps are $2.25 each, what is the least amount she needs to spend in order to spend the same on both presents.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Mrs Collins is buying birthday presents for her twins.Peter wants model train kits and Paul wants stamps for his collection. Mrs Collins has decide to spend exactly the same amount of money on each of the boys . if the model trains are $8.75 and the stamps are $2.25 each, what is the least amount she needs to spend in order to spend the same on both presents.
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Find the least common multiple of 875 and 225
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Factor:
875 = 5*175 = 5*5*35 = 5^3*7
225 = 5*45 = 5^2*3^2
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LCM = 5^3*7*3^2 = 875*9 = $78.75 (amt. to spend on each)
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Ans:: 2*78.75 = $157.50
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Cheers,
Stan H.
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