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Cornerstone · Grades 3–5 Keystones #1 11 September 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 September 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 2⁄7

    Answer: 3⁄7
  2. 2. Algebra Two-step equations

    Solve: 6x + 12 = 42

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

    Calculate the hypotenuse when a = 9cm and b = 8cm

    Answer: 12.04cm
  4. 4. Ratio Sharing in a ratio

    Share 84 in the ratio 3:4

    Answer: 36 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 6, 7, 42, 5, 44, 43, 12

    Answer: 22.7

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