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Cornerstone · Grades 3–5 Keystones #1 6 April 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 April 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄4

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 6x - 14 = 10

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

    Calculate the hypotenuse when a = 9cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 15.81cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 3:2

    Answer: 27 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 12, 27, 20, 29, 31, 6, 24, 45

    Answer: 24.25

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