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Cornerstone · Grades 3–5 Keystones #1 8 September 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 September 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄11 + 1⁄11

    Answer: 7⁄11
  2. 2. Algebra Two-step equations

    Solve: 5x + 3 = 28

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 11cm

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 104 in the ratio 1:4:3

    Answer: 13, 52 and 39
  5. 5. Statistics Mean

    Calculate the mean of: 23, 31, 11, 42, 28, 21, 9

    Answer: 23.6

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