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Cornerstone · Grades 3–5 Keystones #1 17 December 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 December 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄8 + 5⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 5x - 19 = 11

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

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

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

    Share 120 in the ratio 2:1

    Answer: 80 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 29, 39, 38, 25, 15, 47, 48. Give your answer to 2 decimal places

    Answer: 34.43

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