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Cornerstone · Grades 3–5 Keystones #1 15 January 2022 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 January 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄8 + 1⁄5

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

    Solve: 5x - 18 = 27

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 7cm

    Answer: 7.62cm
  4. 4. Ratio Sharing in a ratio

    Share 54 in the ratio 2:1

    Answer: 36 and 18
  5. 5. Statistics Mean

    Find the mean of: 11, 20, 3, 13, 17

    Answer: 12.8

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