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Cornerstone · Grades 3–5 Keystones #1 10 December 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 10 December 2022 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄10 + 4⁄10

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 4x + 9 = 53

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

    Calculate the hypotenuse when a = 9cm and b = 11cm

    Answer: 14.21cm
  4. 4. Ratio Sharing in a ratio

    Share 95 in the ratio 1:4

    Answer: 19 and 76
  5. 5. Statistics Mean

    Find the mean of: 20, 11, 17, 16, 18

    Answer: 16.4

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