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Cornerstone · Grades 3–5 Keystones #1 20 January 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 January 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 2x + 9 = 29

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

    Calculate the hypotenuse when a = 3cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 14.32cm
  4. 4. Ratio Sharing in a ratio

    Divide 210 in the ratio 2:1:2

    Answer: 84, 42 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 6, 20, 10, 16, 16, 30, 36, 33. Give your answer to 2 decimal places

    Answer: 20.88

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