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Cornerstone · Grades 3–5 Keystones #1 25 April 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 25 April 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄7

    Answer: 16⁄21
  2. 2. Algebra Two-step equations

    Solve: 2x + 6 = 20

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

    Calculate the hypotenuse when a = 12cm and b = 10cm

    Answer: 15.62cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 1:4

    Answer: 18 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 6, 45, 28, 33, 22, 29, 19, 25

    Answer: 25.9

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