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Cornerstone · Grades 3–5 Keystones #1 18 January 2023 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 January 2023 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄8 + 1⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 6x + 13 = 79

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 7cm

    Answer: 8.06cm
  4. 4. Ratio Sharing in a ratio

    Share 75 in the ratio 3:2

    Answer: 45 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 47, 21, 20, 8, 14, 40, 49, 14

    Answer: 26.6

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