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Cornerstone · Grades 3–5 Keystones #1 4 March 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 March 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 2x - 18 = -8

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 216 in the ratio 1:1:2

    Answer: 54, 54 and 108
  5. 5. Statistics Mean

    Find the mean of: 6, 3, 18, 16, 7

    Answer: 10

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