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Cornerstone · Grades 3–5 Keystones #1 23 February 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 February 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄8 + 4⁄5

    Answer: 31⁄20
  2. 2. Algebra Two-step equations

    Solve: 2x + 15 = 31

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 11.66cm
  4. 4. Ratio Sharing in a ratio

    Share 55 in the ratio 1:4

    Answer: 11 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 45, 49, 27, 37, 24, 42, 14, 14

    Answer: 31.5

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