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A certain person has two silver cups, and only one cover for both. The first cup weighs 12 oz. If the first cup be covered it weighs twice as much as the other cup, but if the second be covered it weighs three times as much as the first.
An Introduction to Algebra Upon the Inductive Method of Instruction - Page 36
by Warren Colburn - 1828 - 276 pages

## The New Normal Mental Arithmetic: A Complete and Thorough Course by Analysis ...

Edward Brooks - Mental arithmetic - 1908 - 182 pages
...as far as the one marked with a star. A LESSON I. Cup and Cover and Borrowing Problems. PERSON has 2 silver cups, and only one cover for both. The first cup weighs 12 ounces. If the first cup be covered, it will weigh twice as much as the second, but if the second cup...

## The American Intellectual Arithmetic, Designed for the Use of Schools and ...

John Fair Stoddard - Arithmetic - 1849 - 172 pages
...will be the weight of the second cup, and 2, the weight of the first Ğup and cover, &c. 2. A lady has two silver cups, and only one cover for both. The first cup weighs 8 ounces. The first cup and cover weigh 3 times as much as the second cup ; and the second cup and...