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Cornerstone · Grades 3–5 Keystones #1 7 December 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 7 December 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄7

    Answer: 20⁄21
  2. 2. Algebra Two-step equations

    Solve: 7x - 15 = 20

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 9cm

    Answer: 9.49cm
  4. 4. Ratio Sharing in a ratio

    Share 95 in the ratio 2:3

    Answer: 38 and 57
  5. 5. Statistics Mean

    Find the mean of: 4, 7, 15, 13

    Answer: 9.75

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