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

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

  1. 1. Number Adding fractions

    Add: 4⁄7 + 2⁄4

    Answer: 15⁄14
  2. 2. Algebra Two-step equations

    Solve: 6x + 11 = 59

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 4:1

    Answer: 24 and 6
  5. 5. Statistics Mean

    Calculate the mean of: 28, 7, 7, 50, 15, 41, 36

    Answer: 26.3

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