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Lintel · Grades 5–7 Keystones #1 17 April 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 17 April 2022 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    94000

    Answer: 9.4 × 104
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 4x - 12

    Answer: (x + 6)(x - 2)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 36cm, angle = 30°. Find adjacent side

    Answer: 31.2cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 12:12:6

    Answer: 2:2:1
  5. 5. Statistics Mean

    Calculate the mean of: 45, 40, 22, 5, 49, 16, 19

    Answer: 28

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