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Cornerstone · Grades 3–5 Keystones #1 23 May 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 May 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 1⁄7

    Answer: 11⁄28
  2. 2. Algebra Two-step equations

    Solve: 8x - 5 = 107

    Answer: x = 14
  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 128 in the ratio 2:3:3

    Answer: 32, 48 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 5, 9, 11, 45, 28, 35, 37, 18

    Answer: 23.5

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