Numeracy Intermediate November 2018 Unit 2 Q2
2. Mixing 200 ml of white paint with 10 ml of red paint and 5 ml of blue paint makes light purple paint.
Paint is sold in tins of size 250 ml, 500 ml and 1 litre.
Jana is going to make some light purple paint.
She does not want to have any white, red or blue paint left over.
Jana wants to buy as few tins of paint as possible.
She buys a 250 ml tin of blue paint.
How many tins of paint will Jana need to buy altogether?
Complete the table below. [6]
| Colour of paint | Size of tin | Number of tins |
|---|---|---|
| Blue | 250 ml | 1 |
| Red | …………… | …………… |
| White | …………… | …………… |
| Total number of tins of paint = …………… | ||
| Scheme | Marks | Comments | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Red paint 500ml 1 tin | B1 | Allow Red paint 250ml with 2 tins | ||||||||||||
| (250 ÷ 5) × 200 or 50 × 200 or 40 × 250 or 20 × 500 or equivalent calculation that could lead to 10 000 OR sight of 40 : 2 : 1 or equivalent (not 200 : 10 : 5 alone) | M1 | FT 20 × ‘their quantity of red paint’ from the table | ||||||||||||
| 10 000 ml white paint | A1 | OR 10 litres | ||||||||||||
| White paint 1 litre 10 tins | A2 | CAO A1 for any one of
| ||||||||||||
| 12 tins of paint altogether | B1 | CAO must from sum of 1 + 1 + 10 with evidence of 10 000 ml white paint Award SC marks as detailed: Total amount of paint, use of 250 ml tins:
Total amount of paint, use of 500 ml tins:
|