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

Five GCSE retrieval questions · 1 July 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄6

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 7x - 5 = 58

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 108 in the ratio 2:1:3

    Answer: 36, 18 and 54
  5. 5. Statistics Mean

    Calculate the mean of: 21, 12, 40, 23, 46, 36. Give your answer to 2 decimal places

    Answer: 29.67

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