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Cornerstone · Grades 3–5 Keystones #1 21 June 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 June 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄9 + 7⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 6x + 10 = 82

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

    Calculate the hypotenuse when a = 12cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 17.69cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 1:4

    Answer: 9 and 36
  5. 5. Statistics Mean

    Find the mean of: 18, 18, 6

    Answer: 14

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