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Cornerstone · Grades 3–5 Keystones #1 15 May 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 May 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 3⁄8

    Answer: 23⁄40
  2. 2. Algebra Two-step equations

    Solve: 4x + 5 = 25

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 15cm

    Answer: 15.52cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 2:3

    Answer: 10 and 15
  5. 5. Statistics Mean

    Find the mean of: 13, 7, 15, 10, 17

    Answer: 12.4

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