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Lintel · Grades 5–7 Keystones #1 16 July 2021 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 16 July 2021 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    58000

    Answer: 5.8 × 104
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + x - 2

    Answer: (x + 2)(x - 1)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 17cm, angle = 55°. Find opposite

    Answer: 24.3cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 8:4:6

    Answer: 4:2:3
  5. 5. Statistics Mean

    Calculate the mean of: 9, 29, 30, 47, 50, 6, 26, 37

    Answer: 29.3

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