# math

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A necklace, priced between \$50 and \$100, was on sale at 25% off. When the original price (a whole dollar amount) was discounted, the sale price was also a whole number of dollars. What are the possible original prices for the necklace?

• math -

p is a whole number between 50 and 100

(3/4) p whole number

well p = 100 works (then get it for 75)

p = 80 works (then get it for 60)

as a matter of fact anything in there divisible by 4 works

52
56
60
64 etc

• math -

I am trying to help my son with the same problem. At first I thought the above answer was correct too. Then I started to second guess myself because \$50-\$100 is the SALE price so we need to find the ORIGINAL price THEN take 25% off that to get the sale price. The above answer (52, 56, 60, 64....) is if we take 25% off of the sale price (\$50-\$100). I think we are doing it backwards. ????? I understand that it's every 4 numbers but I think it may be 68, 72, 76.....
If we assume \$68 is the original price and take 25% of \$68, then we get a sale price of \$51. Any thoughts? Again, I have no idea which way is correct.

• sex -

21

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