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Cornerstone · Grades 3–5 Keystones #1 14 October 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 14 October 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 4⁄7

    Answer: 27⁄35
  2. 2. Algebra Two-step equations

    Solve: 3x - 6 = 6

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 9cm

    Answer: 9.85cm
  4. 4. Ratio Sharing in a ratio

    Divide 261 in the ratio 3:4:2

    Answer: 87, 116 and 58
  5. 5. Statistics Mean

    Find the mean of: 13, 8, 14, 17, 17

    Answer: 13.8

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