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Cornerstone · Grades 3–5 Keystones #1 9 May 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 May 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄5

    Answer: 14⁄15
  2. 2. Algebra Two-step equations

    Solve: 7x + 6 = 83

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 16.55cm
  4. 4. Ratio Sharing in a ratio

    Divide 120 in the ratio 2:2:1

    Answer: 48, 48 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 10, 26, 35, 27, 16, 49, 26

    Answer: 27

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