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Cornerstone · Grades 3–5 Keystones #1 4 October 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 October 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 1⁄7

    Answer: 15⁄56
  2. 2. Algebra Two-step equations

    Solve: 5x - 8 = 67

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 9.85cm
  4. 4. Ratio Sharing in a ratio

    Divide 162 in the ratio 2:3:1

    Answer: 54, 81 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 21, 36, 28, 38, 6, 49. Give your answer to 2 decimal places

    Answer: 29.67

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