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

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

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

    Solve: 5x - 12 = 63

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 10.3cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 1:2

    Answer: 30 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 40, 15, 32, 37, 33, 14, 12, 13

    Answer: 24.5

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