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HigherNon-calculatorA7 Functions

Question 1 · 4 marks

Spec and skills
  • Paper scope: Paper 1: non-calculator practice
  • Spec A7
  • Spec A18
  • Original practice question
  • Answer and supported method checks
A number machine: input →\rightarrow square →\rightarrow multiply by 2 →\rightarrow subtract 8 →\rightarrow output.
(a)
The output is 64. Find all the possible inputs.
2 marks