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Cornerstone · Grades 3–5 Keystones #1 26 January 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 January 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 4x + 15 = 51

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 9cm

    Answer: 9.49cm
  4. 4. Ratio Sharing in a ratio

    Share 91 in the ratio 4:3

    Answer: 52 and 39
  5. 5. Statistics Mean

    Find the mean of: 19, 20, 17, 19

    Answer: 18.75

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