in a magazine 3/7 of the pages have advertisements on them even than 12 pages have advertisements on them , work out the number of pages in the magazine
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If 3/7 of the magazine’s pages is 12 pages, then 1/7 of the magazine is 12/3=4 pages, and the whole magazine has 7 times this number of pages, so the magazine has 7×4=28 pages.

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