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Cornerstone · Grades 3–5 Keystones #1 2 November 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 2 November 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄9 + 3⁄9

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

    Solve: 3x + 15 = 48

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 15cm

    Answer: 18.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 4:2:3

    Answer: 56, 28 and 42
  5. 5. Statistics Mean

    Find the mean of: 6, 12, 20, 5, 5

    Answer: 9.6

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