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Cornerstone · Grades 3–5 Keystones #1 4 February 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 February 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 2⁄6

    Answer: 10⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x - 19 = 53

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

    Calculate the hypotenuse when a = 6cm and b = 9cm. Give your answer to 2 decimal places

    Answer: 10.82cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 2:3:3

    Answer: 20, 30 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 16, 37, 44, 39, 12, 23, 38, 22. Give your answer to 2 decimal places

    Answer: 28.88

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