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Cornerstone · Grades 3–5 Keystones #1 20 October 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 October 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 3⁄7

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

    Solve: 6x + 15 = 63

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

    Calculate the hypotenuse when a = 8cm and b = 6cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 56 in the ratio 1:2:1

    Answer: 14, 28 and 14
  5. 5. Statistics Mean

    Find the mean of: 13, 15, 7, 8, 17

    Answer: 12

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