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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?
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Clue
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%
62.5 GRAMS THE SMALLER BRICK IS NOT ONLY FOUR TIMES SHORTER THAN THE FIRST ONE, BUT IT IS ALSO FOUR TIMES NARROWER AND FOUR TIMES LOWER AND THEREFORE THE RATIO OF THE VOLUME AND WEIGHT IS 4 X 4 X 4 = 64 TIMES. SO 4KG/64 = 62.5 GRAMS
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
THREE. THEY'RE ALL IN A ROW, DUCK 1, DUCK 2 FOLLOWED BY DUCK 3. SO DUCKS 1 AND 2 ARE IN FRONT OF DUCK 3, DUCKS 2 AND 3 ARE BEHIND DUCK 1 AND DUCK 2 IS IN THE MIDDLE
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