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Cornerstone · Grades 3–5 Keystones #1 6 August 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 August 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄5

    Answer: 16⁄15
  2. 2. Algebra Two-step equations

    Solve: 5x + 15 = 55

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

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 76 in the ratio 2:1:1

    Answer: 38, 19 and 19
  5. 5. Statistics Mean

    Calculate the mean of: 20, 16, 33, 11, 6, 15. Give your answer to 2 decimal places

    Answer: 16.83

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