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Cornerstone · Grades 3–5 Keystones #1 2 April 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 April 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄6 + 2⁄6

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

    Solve: 3x + 8 = 20

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

    Calculate the hypotenuse when a = 6cm and b = 7cm

    Answer: 9.22cm
  4. 4. Ratio Sharing in a ratio

    Divide 153 in the ratio 1:4:4

    Answer: 17, 68 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 47, 47, 11, 21, 27, 9, 38, 40

    Answer: 30

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