Foundation June 2025 Paper 3 Q4

AQACurrent spec4 marksFunctionsSolving Simple Equations

4 Here is a number machine.

Number machine: Input, then × 3, then − 5, then Output
(a) Work out the output when the input is 4 [1 mark]
(b) Work out the input when the output is 19 [2 marks]
(c) Complete this number machine. [1 mark]
Number machine: Input 16, then + 2, then an empty box, then Output 3