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

Five GCSE retrieval questions · 7 March 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 4⁄6

    Answer: 1⁄1
  2. 2. Algebra Two-step equations

    Solve: 3x - 9 = 24

    Answer: x = 11
  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 91 in the ratio 3:4

    Answer: 39 and 52
  5. 5. Statistics Mean

    Calculate the mean of: 45, 20, 9, 32, 23, 28. Give your answer to 2 decimal places

    Answer: 26.17

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