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Cornerstone · Grades 3–5 Keystones #1 18 January 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 January 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 3⁄5

    Answer: 19⁄15
  2. 2. Algebra Two-step equations

    Solve: 8x - 13 = 19

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

    Calculate the hypotenuse when a = 9cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 11.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 72 in the ratio 4:1:1

    Answer: 48, 12 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 16, 32, 33, 16, 17, 20. Give your answer to 2 decimal places

    Answer: 22.33

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