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Cornerstone · Grades 3–5 Keystones #1 1 October 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 1 October 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄11 + 1⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 7x - 20 = 8

    Answer: x = 4
  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

    Share 56 in the ratio 4:3

    Answer: 32 and 24
  5. 5. Statistics Mean

    Find the mean of: 8, 2, 19

    Answer: 9.6666666666667

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