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Cornerstone · Grades 3–5 Keystones #1 17 November 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 November 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 4⁄6

    Answer: 19⁄24
  2. 2. Algebra Two-step equations

    Solve: 3x + 9 = 30

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 15cm

    Answer: 19.21cm
  4. 4. Ratio Sharing in a ratio

    Divide 153 in the ratio 2:3:4

    Answer: 34, 51 and 68
  5. 5. Statistics Mean

    Find the mean of: 12, 18, 17, 7

    Answer: 13.5

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