Foundation November 2018 Paper 1 Q5
5.
(a)
In summer, the average temperature at the South Pole is –28°C.
In winter, the average temperature drops to –60°C.
(i) By how many degrees does the average temperature drop from summer to winter? [1]
(ii)
The average winter temperature at the North Pole is 20°C warmer than the average winter temperature at the South Pole.
What is the average winter temperature at the North Pole? [1]
(b)
(i)
When two numbers are multiplied, the result is –12.
When the same two numbers are added, the result is 1.
What are the two numbers? [2]
(ii)
When three numbers are multiplied together, the result is 30.
When the same three numbers are added together, the result is 0.
What are the three numbers? [2]
| Scheme | Marks | Comments |
|---|---|---|
| (i) 32 | B1 | Allow –32 |
| (ii) –40 | B1 |
| Scheme | Marks | Comments |
|---|---|---|
| (i) –3 and 4 | B2 | In either order B1 for two numbers with opposite signs whose product is –12 or whose sum is 1 |
| (ii) Correct solution e.g. 5 and –2 and –3 or 6 and –5 and –1 | B2 | In any order B1 for three numbers with two negative whose product is 30 or whose sum is 0 or for –5 and 2 and 3 or –6 and 5 and 1, three numbers whose product is –30 and whose sum is 0. |
| (6) |