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Cornerstone · Grades 3–5 Keystones #1 15 November 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 15 November 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄11 + 6⁄11

    Answer: 8⁄11
  2. 2. Algebra Two-step equations

    Solve: 8x - 15 = 17

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

    Calculate the hypotenuse when a = 6cm and b = 14cm

    Answer: 15.23cm
  4. 4. Ratio Sharing in a ratio

    Divide 209 in the ratio 3:4:4

    Answer: 57, 76 and 76
  5. 5. Statistics Mean

    Calculate the mean of: 31, 29, 17, 29, 46, 15, 9

    Answer: 25.1

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