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Cornerstone · Grades 3–5 Keystones #1 16 October 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 October 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 2⁄6

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

    Solve: 5x - 18 = 17

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 10.63cm
  4. 4. Ratio Sharing in a ratio

    Share 64 in the ratio 1:3

    Answer: 16 and 48
  5. 5. Statistics Mean

    Find the mean of: 18, 20, 7

    Answer: 15