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Cornerstone · Grades 3–5 Keystones #1 13 November 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 November 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 1⁄6

    Answer: 23⁄30
  2. 2. Algebra Two-step equations

    Solve: 5x + 11 = 41

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 76 in the ratio 1:3

    Answer: 19 and 57
  5. 5. Statistics Mean

    Calculate the mean of: 18, 49, 39, 9, 16, 13, 15, 7

    Answer: 20.8

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