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Cornerstone · Grades 3–5 Keystones #1 12 October 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 12 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 1⁄5

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 4x + 15 = 63

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 8cm

    Answer: 14.42cm
  4. 4. Ratio Sharing in a ratio

    Divide 216 in the ratio 3:1:4

    Answer: 81, 27 and 108
  5. 5. Statistics Mean

    Find the mean of: 6, 3, 5

    Answer: 4.6666666666667

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