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Cornerstone · Grades 3–5 Keystones #1 17 September 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 17 September 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄6

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 3x - 9 = 27

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 13.45cm
  4. 4. Ratio Sharing in a ratio

    Divide 182 in the ratio 3:3:1

    Answer: 78, 78 and 26
  5. 5. Statistics Mean

    Find the mean of: 2, 16, 3, 19, 20

    Answer: 12

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