Foundation June 2023 Paper 1 Q9
9 Here is a number machine.

(a) Work out the output when the input is 14 (1)
Here is a different number machine.

When the input is 11 the output is 64
(b) Write a number on the dotted line to complete the number machine. (2)
| Scheme | Marks |
|---|---|
| 146 | B1 |
| (1) |
| Scheme | Marks |
|---|---|
| \(64 - 9\) (= 55) or \((64 - 9) \div 11\) or \(11x + 9 = 64\) | M1 |
| Correct answer scores full marks (unless from obvious incorrect working) Answer: 5 | A1 |
| (2) | |
| (3 marks) |
Notes
M1: for working backwards from the output of 64 or setting up an equation