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Cornerstone · Grades 3–5 Keystones #1 18 October 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 2⁄4

    Answer: 11⁄8
  2. 2. Algebra Two-step equations

    Solve: 7x - 18 = 66

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 13cm

    Answer: 14.76cm
  4. 4. Ratio Sharing in a ratio

    Share 21 in the ratio 1:2

    Answer: 7 and 14
  5. 5. Statistics Mean

    Find the mean of: 4, 2, 14, 2, 17

    Answer: 7.8

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