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Cornerstone · Grades 3–5 Keystones #1 18 July 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 18 July 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄11 + 3⁄11

    Answer: 5⁄11
  2. 2. Algebra Two-step equations

    Solve: 5x + 10 = 70

    Answer: x = 12
  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 50 in the ratio 1:4

    Answer: 10 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 7, 35, 11, 49, 38, 9, 13

    Answer: 23.1

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