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Cornerstone · Grades 3–5 Keystones #1 28 December 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 28 December 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 7⁄8

    Answer: 37⁄24
  2. 2. Algebra Two-step equations

    Solve: 4x + 3 = 23

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 65 in the ratio 1:4

    Answer: 13 and 52
  5. 5. Statistics Mean

    Calculate the mean of: 10, 48, 43, 22, 50, 45. Give your answer to 2 decimal places

    Answer: 36.33

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