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Lintel · Grades 5–7 Keystones #1 21 March 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 21 March 2022 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    87000

    Answer: 8.7 × 104
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 6x + 8

    Answer: (x - 4)(x - 2)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 29cm, angle = 39°. Find opposite

    Answer: 23.5cm
  4. 4. Ratio Mixed ratio problems

    Express the first part of 5:6 as a fraction in simplest form

    Answer: 5⁄11
  5. 5. Statistics Mean

    Calculate the mean of: 49, 13, 23, 7, 45, 5

    Answer: 23.7

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