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Cornerstone · Grades 3–5 Keystones #1 18 September 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 18 September 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 1⁄6

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

    Solve: 5x - 11 = 44

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

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 160 in the ratio 1:4:3

    Answer: 20, 80 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 7, 44, 21, 40, 12, 21, 29

    Answer: 24.9

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