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

Five GCSE retrieval questions · 5 May 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 2⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x + 7 = 13

    Answer: x = 3
  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

    Divide 84 in the ratio 1:2:1

    Answer: 21, 42 and 21
  5. 5. Statistics Mean

    Calculate the mean of: 42, 39, 50, 35, 11, 7, 23. Give your answer to 2 decimal places

    Answer: 29.57

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