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Cornerstone · Grades 3–5 Keystones #1 10 September 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 September 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄4

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x - 15 = 24

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 1:4

    Answer: 12 and 48
  5. 5. Statistics Mean

    Find the mean of: 5, 9, 4, 3

    Answer: 5.25

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