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Cornerstone · Grades 3–5 Keystones #1 25 October 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 25 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 2⁄6

    Answer: 8⁄15
  2. 2. Algebra Two-step equations

    Solve: 7x - 18 = 87

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

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

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

    Divide 162 in the ratio 1:4:4

    Answer: 18, 72 and 72
  5. 5. Statistics Mean

    Find the mean of: 11, 6, 16

    Answer: 11

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