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Cornerstone · Grades 3–5 Keystones #1 23 November 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 November 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 2⁄3

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

    Solve: 3x - 19 = 23

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 78 in the ratio 1:1:4

    Answer: 13, 13 and 52
  5. 5. Statistics Mean

    Find the mean of: 9, 12, 3, 5, 6

    Answer: 7

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