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

Five GCSE retrieval questions · 7 June 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 6⁄7

    Answer: 25⁄21
  2. 2. Algebra Two-step equations

    Solve: 7x + 5 = 40

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 66 in the ratio 4:1:1

    Answer: 44, 11 and 11
  5. 5. Statistics Mean

    Calculate the mean of: 21, 18, 40, 47, 27, 21

    Answer: 29

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