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Cornerstone · Grades 3–5 Keystones #1 27 October 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 1⁄4

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x + 8 = 24

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 9cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 175 in the ratio 2:4:1

    Answer: 50, 100 and 25
  5. 5. Statistics Mean

    Calculate the mean of: 14, 31, 31, 43, 15, 29, 34, 14

    Answer: 26.4

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