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Cornerstone · Grades 3–5 Keystones #1 23 January 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄8 + 4⁄7

    Answer: 37⁄28
  2. 2. Algebra Two-step equations

    Solve: 7x + 7 = 28

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

    Calculate the hypotenuse when a = 11cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 12.53cm
  4. 4. Ratio Sharing in a ratio

    Share 54 in the ratio 1:2

    Answer: 18 and 36
  5. 5. Statistics Mean

    Find the mean of: 15, 5, 15, 20, 5

    Answer: 12

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