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Cornerstone · Grades 3–5 Keystones #1 7 December 2018 Skills week 1 of 7
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Five GCSE retrieval questions · 7 December 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 3⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 5x - 20 = 25

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 8cm

    Answer: 12.81cm
  4. 4. Ratio Sharing in a ratio

    Share 35 in the ratio 2:3

    Answer: 14 and 21
  5. 5. Statistics Mean

    Find the mean of: 19, 19, 6

    Answer: 14.666666666667

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