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Cornerstone · Grades 3–5 Keystones #1 21 July 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 July 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 1⁄5

    Answer: 17⁄35
  2. 2. Algebra Two-step equations

    Solve: 3x + 8 = 20

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

    Calculate the hypotenuse when a = 11cm and b = 4cm

    Answer: 11.7cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 2:1

    Answer: 20 and 10
  5. 5. Statistics Mean

    Find the mean of: 6, 17, 14

    Answer: 12.333333333333

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