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Cornerstone · Grades 3–5 Keystones #1 10 March 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 March 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄10 + 2⁄10

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x - 7 = 83

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 15cm

    Answer: 15.3cm
  4. 4. Ratio Sharing in a ratio

    Share 44 in the ratio 1:3

    Answer: 11 and 33
  5. 5. Statistics Mean

    Calculate the mean of: 26, 38, 37, 45, 50, 30, 34, 48

    Answer: 38.5

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