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Cornerstone · Grades 3–5 Keystones #1 12 June 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 12 June 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄9 + 1⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 3x + 3 = 27

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

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

    Share 57 in the ratio 1:2

    Answer: 19 and 38
  5. 5. Statistics Mean

    Calculate the mean of: 22, 32, 27, 21, 36, 15

    Answer: 25.5

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