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Cornerstone · Grades 3–5 Keystones #1 20 February 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 February 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 5⁄7

    Answer: 22⁄21
  2. 2. Algebra Two-step equations

    Solve: 7x - 14 = 56

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 10.44cm
  4. 4. Ratio Sharing in a ratio

    Share 91 in the ratio 4:3

    Answer: 52 and 39
  5. 5. Statistics Mean

    Calculate the mean of: 9, 29, 20, 47, 29, 29, 47

    Answer: 30

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