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Cornerstone · Grades 3–5 Keystones #1 19 September 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 September 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 6⁄8

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 6x + 15 = 33

    Answer: x = 3
  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 70 in the ratio 1:4

    Answer: 14 and 56
  5. 5. Statistics Mean

    Find the mean of: 9, 20, 10, 2, 3

    Answer: 8.8

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