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Cornerstone · Grades 3–5 Keystones #1 2 September 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 September 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 3⁄6

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 3x + 14 = 32

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 40 in the ratio 1:3

    Answer: 10 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 22, 27, 32, 14, 9, 49, 48. Give your answer to 2 decimal places

    Answer: 28.71

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