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Cornerstone · Grades 3–5 Keystones #1 6 June 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 June 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 2⁄3

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x + 4 = 53

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 68 in the ratio 3:1

    Answer: 51 and 17
  5. 5. Statistics Mean

    Calculate the mean of: 44, 39, 7, 28, 36, 23, 11. Give your answer to 2 decimal places

    Answer: 26.86

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