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Cornerstone · Grades 3–5 Keystones #1 15 May 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 May 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 1⁄7

    Answer: 43⁄56
  2. 2. Algebra Two-step equations

    Solve: 3x - 11 = 13

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 2:1

    Answer: 60 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 9, 14, 49, 11, 32, 22, 21. Give your answer to 2 decimal places

    Answer: 22.57

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