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0 / 60 seg.
If the price off a dress was cut by 20% for a sale, by what percentage off the sale price must it be increased by to resell it at the original price?
2
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Clue
YOU NEED TO TAKE OUT THREE SOCKS. TO HAVE A MATCHING PAIR, YOU NEED TO TAKE 2 SOCKS THAT ARE OF THE SAME COLOR. WHEN YOU TAKE 3 SOCKS, 2 OF THE SOCKS WILL BE OF THE SAME COLOR
25%. IF THE ORIGINAL PRICE OF THE DRESS WAS $100 AND AFTER 20% DROP IT WILL BE $80. TO RESELL AT THE ORIGINAL PRICE, THE PRICE HAS TO BE INCREASED BY: 20⁄80 X 100 = 25%
4. IF HALF OF 5 IS 3, THEN HALF OF 10 IS 6, BASED ON PROPORTION. SINCE 2/3 OF 1/2 IS 1/3 (2/3 X 1/2 = 1/3), 2/3 OF 6 IS 4. ANOTHER ALTERNATIVE IS TO ROUND UP THE ANSWER TO THE NEAREST INTEGER. 1/2 X 5 = 2.5, ROUND UP TO 3 1/3 X 10 = 3.3, ROUND UP TO 4
THREE MEN. THE THREE MEN CHOP DOWN THREE TREES IN THREE HOURS. THE SAME THREE MEN CHOP DOWN THREE MORE TREES IN ANOTHER THREE HOURS. THIS GIVES A TOTAL OF SIX TREES IN SIX HOURS WITH THREE MEN
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