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Cornerstone · Grades 3–5 Keystones #1 22 December 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 December 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 1⁄3

    Answer: 16⁄21
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 20

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

    Calculate the hypotenuse when a = 7cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 12.21cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 3:2

    Answer: 27 and 18
  5. 5. Statistics Mean

    Find the mean of: 15, 7, 13, 5

    Answer: 10

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