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Cornerstone · Grades 3–5 Keystones #1 20 May 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 May 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 1⁄6

    Answer: 17⁄30
  2. 2. Algebra Two-step equations

    Solve: 7x + 8 = 57

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 8cm

    Answer: 10.63cm
  4. 4. Ratio Sharing in a ratio

    Share 42 in the ratio 1:2

    Answer: 14 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 36, 8, 11, 15, 26, 22

    Answer: 19.7

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