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Lintel · Grades 5–7 Keystones #1 8 May 2022
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Keystones — Lintel

Five GCSE retrieval questions · 8 May 2022 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 47 + ? = 142

    Answer: 95
  2. 2. Algebra

    Solve: x⁄4 = 1.75

    Answer: x = 7
  3. 3. Geometry

    Calculate the hypotenuse when a = 11cm and b = 12cm

    Answer: 16.28cm
  4. 4. Ratio

    Find 75% of 407

    Answer: 305.25
  5. 5. Statistics

    A bag has 8 red and 5 blue balls. What is the probability of picking a red ball?

    Answer: 8⁄13

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