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Cornerstone · Grades 3–5 Keystones #1 15 April 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 April 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄7

    Answer: 10⁄21
  2. 2. Algebra Two-step equations

    Solve: 5x + 3 = 23

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 15.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 252 in the ratio 3:2:4

    Answer: 84, 56 and 112
  5. 5. Statistics Mean

    Calculate the mean of: 19, 47, 8, 21, 27, 7, 47. Give your answer to 2 decimal places

    Answer: 25.14

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