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Cornerstone · Grades 3–5 Keystones #1 25 February 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 February 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 2⁄3

    Answer: 13⁄15
  2. 2. Algebra Two-step equations

    Solve: 5x + 5 = 30

    Answer: x = 5
  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 150 in the ratio 1:3:2

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

    Calculate the mean of: 46, 21, 28, 26, 30, 30, 36, 47

    Answer: 33

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