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Cornerstone · Grades 3–5 Keystones #1 24 August 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 24 August 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 2⁄7

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

    Solve: 6x - 19 = 17

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

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

    Answer: 11.31cm
  4. 4. Ratio Sharing in a ratio

    Divide 196 in the ratio 1:4:2

    Answer: 28, 112 and 56
  5. 5. Statistics Mean

    Find the mean of: 12, 8, 6, 18, 18

    Answer: 12.4

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