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Cornerstone · Grades 3–5 Keystones #1 19 January 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 January 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄7 + 1⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x - 5 = 10

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

    Calculate the hypotenuse when a = 9cm and b = 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 160 in the ratio 3:1:4

    Answer: 60, 20 and 80
  5. 5. Statistics Mean

    Calculate the mean of: 20, 33, 17, 42, 41, 47

    Answer: 33.3

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