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Cornerstone · Grades 3–5 Keystones #1 23 August 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 August 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 1⁄4

    Answer: 13⁄20
  2. 2. Algebra Two-step equations

    Solve: 5x + 10 = 30

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 12.21cm
  4. 4. Ratio Sharing in a ratio

    Divide 140 in the ratio 2:2:1

    Answer: 56, 56 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 28, 30, 38, 50, 33, 21. Give your answer to 2 decimal places

    Answer: 33.33

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