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Cornerstone · Grades 3–5 Keystones #1 15 September 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 September 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄8

    Answer: 19⁄24
  2. 2. Algebra Two-step equations

    Solve: 8x - 9 = 87

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

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

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

    Divide 100 in the ratio 2:2:1

    Answer: 40, 40 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 15, 26, 46, 9, 42, 24, 6, 39. Give your answer to 2 decimal places

    Answer: 25.88

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