Foundation June 2019 Paper 3 Q23
23 In one hour a machine can make
600 nuts
or
720 bolts.
At 3 pm the machine starts working.
It makes 900 nuts and then changes to making bolts.
How many bolts will the machine make by 8 pm? [4 marks]
| Answer | Mark | Comments |
|---|---|---|
| Alternative method 1 | ||
| \(900 \div 600\) or 1.5 | M1 | oe implied by 4.30 (pm) or 16.30 |
| \((8 - 3) -\) their 1.5 or \(5 -\) their 1.5 or 3.5 | M1dep | oe |
| their \(3.5 \times 720\) | M1dep | oe |
| 2520 | A1 | |
| Alternative method 2 | ||
| \(900 \div \dfrac{600}{60}\) or \(900 \div 10\) or 90 | M1 | oe implied by 4.30 (pm) or 16.30 |
| \((8 - 3) - (\)their \(90 \div 60)\) or \(5 - (\)their \(90 \div 60)\) or 3.5 or \((8 - 3) \times 60 -\) their 90 or \(5 \times 60 -\) their 90 or 210 | M1dep | oe |
| their \(3.5 \times 720\) or their \(210 \times 720 \div 60\) | M1dep | oe |
| 2520 | A1 | |
Additional guidance
| Condone 3:30 or 3.30 for 3.5(hours) | M1M1 |
| Condone 1:30 or 1.30 for 1.5(hours) | M1 |