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Cornerstone · Grades 3–5 Keystones #1 12 May 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 May 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄10 + 3⁄10

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 2x - 14 = 10

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

    Calculate the hypotenuse when a = 8cm and b = 6cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 40 in the ratio 1:3

    Answer: 10 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 45, 25, 7, 46, 23, 5. Give your answer to 2 decimal places

    Answer: 25.17

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