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

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

  1. 1. Number Adding fractions

    Add: 4⁄5 + 1⁄3

    Answer: 17⁄15
  2. 2. Algebra Two-step equations

    Solve: 7x + 11 = 53

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 4cm

    Answer: 10.77cm
  4. 4. Ratio Sharing in a ratio

    Share 55 in the ratio 2:3

    Answer: 22 and 33
  5. 5. Statistics Mean

    Find the mean of: 7, 9, 20

    Answer: 12

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