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Cornerstone · Grades 3–5 Keystones #1 3 February 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 3 February 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 2⁄7

    Answer: 19⁄42
  2. 2. Algebra Two-step equations

    Solve: 5x - 8 = 57

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 16.55cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 1:4

    Answer: 12 and 48
  5. 5. Statistics Mean

    Find the mean of: 4, 17, 18

    Answer: 13