Foundation November 2022 Paper 3 Q22
22 Rob has been asked to divide 120 in the ratio \(\;3 : 5\)
Here is his working.
\[120 \div 3 = 40 \qquad 120 \div 5 = 24\]Rob’s working is not correct.
Describe what Rob has done wrong. (1)
| Answer | Mark | Mark scheme |
|---|---|---|
| Description | C1 | Identifies a mistake in the working Acceptable examples Rob should divide by 8 He should have added the 3 and 5 first He divided 120 by 3 and 5 instead of 8 He did not do it as \(120 \times \dfrac{3}{8}\) and \(120 \times \dfrac{5}{8}\) He did not add the two ratios first Not acceptable examples He has done it in two parts but he should do it in one The answer should be 45 : 75 They do not add up to 120 He is supposed to add his numbers 40 + 24 does not equal 120 |