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Cornerstone · Grades 3–5 Keystones #1 16 January 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄5

    Answer: 16⁄15
  2. 2. Algebra Two-step equations

    Solve: 7x + 3 = 31

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

    Calculate the hypotenuse when a = 6cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 8.49cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 1:2

    Answer: 15 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 15, 10, 29, 39, 23, 30. Give your answer to 2 decimal places

    Answer: 24.33

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