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Cornerstone · Grades 3–5 Keystones #1 11 November 2024 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 November 2024 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 5x + 6 = 21

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

    Calculate the hypotenuse when a = 8cm and b = 13cm

    Answer: 15.26cm
  4. 4. Ratio Sharing in a ratio

    Divide 108 in the ratio 2:3:1

    Answer: 36, 54 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 38, 33, 24, 26, 22, 39, 37

    Answer: 31.3

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