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Cornerstone · Grades 3–5 Keystones #1 3 October 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 3 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 2⁄3

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

    Solve: 2x + 15 = 31

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

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 4:1

    Answer: 64 and 16
  5. 5. Statistics Mean

    Calculate the mean of: 25, 33, 11, 9, 24, 46, 39, 41

    Answer: 28.5

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