Here is a number machine.
input → ×3\times 3×3 → −5- 5−5 → output
Find the output when the input is 8
Find the output when the input is -2
Find the input when the output is 25
Practise OCR GCSE Maths Function Machines with exam-style questions for Foundation and Higher tier. 39 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.