Foundation June 2025 Paper 1 Q13
13 Here is a number machine.
(a) Find the output when the input is 6 (1)
(b) Find the input when the output is \(-11\) (2)
| Answer | Mark | Mark scheme |
|---|---|---|
| 10 | B1 | cao |
Additional guidance
May be seen by machine
| Answer | Mark | Mark scheme |
|---|---|---|
| \(-1\) | M1 | starts method to find input using inverse operations eg \(-11 + 8\ (= -3)\) or sight of \(+8\) and \(\div 3\) |
| A1 | for \(-1\) |
Additional guidance
Allow \(-\,-8\) for \(+8\)
Allow \(\times \dfrac{1}{3}\) for \(\div 3\)
Do not allow a misread of 11 for \(-11\)
Embedded answer
eg \(-1 \times 3 - 8 = -11\) scores M1A0