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Cornerstone · Grades 3–5 Keystones #1 13 August 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 August 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄7

    Answer: 20⁄21
  2. 2. Algebra Two-step equations

    Solve: 5x + 5 = 50

    Answer: x = 9
  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 150 in the ratio 3:2:1

    Answer: 75, 50 and 25
  5. 5. Statistics Mean

    Calculate the mean of: 47, 20, 38, 29, 26, 42, 15

    Answer: 31

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