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Cornerstone · Grades 3–5 Keystones #1 8 August 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 8 August 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 1⁄5

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

    Solve: 2x - 8 = 14

    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 120 in the ratio 3:1:4

    Answer: 45, 15 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 28, 31, 20, 9, 45, 41, 11, 39

    Answer: 28

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