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Cornerstone · Grades 3–5 Keystones #1 7 September 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 7 September 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 6x + 13 = 61

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 70 in the ratio 3:1:3

    Answer: 30, 10 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 19, 7, 34, 39, 49, 35

    Answer: 30.5

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