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Cornerstone · Grades 3–5 Keystones #1 22 August 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 August 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 6⁄7

    Answer: 44⁄35
  2. 2. Algebra Two-step equations

    Solve: 5x - 18 = 42

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 8.6cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 4:1

    Answer: 20 and 5
  5. 5. Statistics Mean

    Calculate the mean of: 47, 30, 19, 8, 7, 45, 47, 40. Give your answer to 2 decimal places

    Answer: 30.38

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