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

Five GCSE retrieval questions · 3 December 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 1⁄3

    Answer: 25⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x + 9 = 33

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 5.83cm
  4. 4. Ratio Sharing in a ratio

    Divide 152 in the ratio 1:2:1

    Answer: 38, 76 and 38
  5. 5. Statistics Mean

    Calculate the mean of: 22, 47, 27, 23, 37, 41, 19, 25. Give your answer to 2 decimal places

    Answer: 30.13

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