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Cornerstone · Grades 3–5 Keystones #1 16 September 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 September 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 2⁄4

    Answer: 13⁄14
  2. 2. Algebra Two-step equations

    Solve: 8x - 13 = 35

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

    Calculate the hypotenuse when a = 11cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Share 28 in the ratio 1:3

    Answer: 7 and 21
  5. 5. Statistics Mean

    Find the mean of: 13, 16, 4, 13, 14

    Answer: 12

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