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

  1. 1. Number Adding fractions

    Calculate: 3⁄11 + 1⁄11

    Answer: 4⁄11
  2. 2. Algebra Two-step equations

    Solve: 4x - 6 = 26

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 60 in the ratio 2:1:1

    Answer: 30, 15 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 27, 48, 12, 33, 25, 41, 24, 38

    Answer: 31

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