Foundation November 2018 Paper 1 Q16
16 \(a : b = 1 : 6\)
\(a : c = 3 : 1\)
How many times bigger is \(b\) than \(c\)? [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| 3 : 18 or 18 : 3 or \(\dfrac{1}{3} : 1\) or \(1 : \dfrac{1}{3}\) or \(6 \times 3\) | M1 | oe both ratios correctly scaled so that the values for \(a\) are equal (ignore additional scaling) eg 6 : 36 and 6 : 2 |
| 18 | A1 |
Additional guidance
| Do not accept words instead of ratios for M1 | |
| Accept embedded answers eg \(b = 18c\) | M1A1 |
| 1 : 6 2 : 12 3 : 18 4 : 24 (etc) | M1 |
| \(18 - 3\ (= 15)\) | M1A0 |