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Cornerstone · Grades 3–5 Keystones #1 7 December 2022 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 7 December 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄5

    Answer: 31⁄30
  2. 2. Algebra Two-step equations

    Solve: 2x - 15 = 9

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

    Calculate the hypotenuse when a = 11cm and b = 11cm

    Answer: 15.56cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 3:2

    Answer: 54 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 19, 50, 48, 46, 38, 23, 49

    Answer: 39

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