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Cornerstone · Grades 3–5 Keystones #1 17 August 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 August 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 6⁄7

    Answer: 32⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x + 7 = 73

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 216 in the ratio 4:3:1

    Answer: 108, 81 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 32, 48, 15, 38, 15, 27, 14

    Answer: 27

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