Foundation June 2023 Unit 1 Q4
4.
(a) Billy thinks of a number.
Billy halves his number.
His answer is 58.
What number did Billy think of? [1]
Billy halves his number.
His answer is 58.
What number did Billy think of? [1]
(b) Siân thinks of a different number.
Siân squares her number.
Her answer is 9.
What number did Siân think of? [1]
Siân squares her number.
Her answer is 9.
What number did Siân think of? [1]
(c) Calculate 40% of 120. [2]
| Scheme | Marks | Comments |
|---|---|---|
| 116 | B1 |
| Scheme | Marks | Comments |
|---|---|---|
| 3 OR – 3 | B1 | B0 for 3 ×3 |
| Scheme | Marks | Comments |
|---|---|---|
| \(\dfrac{40}{100}\) × 120 or equivalent | M1 | Other possible methods for M1 include
M0 for 12 alone |
| 48 | A1 | M1A0 for 48 followed by 72 or 168. SC1 for unsupported 72 or 168. |