Foundation November 2022 Paper 3 Q7
7 It takes a librarian \(1\dfrac{1}{4}\) minutes to put a plastic cover on a book.
Work out how many books the librarian can cover in \(\dfrac{1}{2}\) hour. [3]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 24 | 3 | M1 for \(1\dfrac{1}{4}\) and \(\dfrac{1}{2}\) correct in consistent units M1 for division in correct order between their converted \(\dfrac{1}{2}\) and \(1\dfrac{1}{4}\) OR M1 for \(1\dfrac{1}{4}\) and \(\dfrac{1}{2}\) correct in consistent units M1 for three correct consecutive/linked terms | M0 M1 is possible in either method \(1\dfrac{1}{4}\) or \(\dfrac{5}{4}\) or 1.25 and 30; 75 and 1800; \(\dfrac{1}{48}\) and \(\dfrac{1}{2}\) or (0.021 or 0.0208...) and 0.5 Conversions may be incorrect but clearly represent \(1\dfrac{1}{4}\) and \(\dfrac{1}{2}\) e.g. \(\dfrac{1}{2} \div 1.25\) \(1\dfrac{1}{4}\) or \(\dfrac{5}{4}\) or 1.25 and 30; 75 and 1800; \(\dfrac{1}{48}\) and \(\dfrac{1}{2}\) or (0.021 or 0.0208...) and 0.5 e.g. \(\left[1\dfrac{1}{4}, 1\right]\) \(2\dfrac{1}{2}, 2\) \(3\dfrac{3}{4}, 3\) 5, 4 10, 8 20, 16 … or [1m 15s, 1] 2m 30s, 2 3m 45s, 3 … |