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Cornerstone · Grades 3–5 Keystones #1 16 January 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 January 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄12 + 4⁄12

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 8x - 11 = 21

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

    Calculate the hypotenuse when a = 3cm and b = 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 117 in the ratio 4:2:3

    Answer: 52, 26 and 39
  5. 5. Statistics Mean

    Calculate the mean of: 32, 7, 23, 47, 50, 19, 21, 30

    Answer: 28.6

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