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Cornerstone · Grades 3–5 Keystones #1 28 April 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 April 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 6⁄7

    Answer: 37⁄35
  2. 2. Algebra Two-step equations

    Solve: 2x + 13 = 21

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 75 in the ratio 1:4

    Answer: 15 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 14, 27, 17, 12, 39, 7. Give your answer to 2 decimal places

    Answer: 19.33

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