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

Five GCSE retrieval questions · 1 December 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 1⁄8

    Answer: 29⁄40
  2. 2. Algebra Two-step equations

    Solve: 2x + 11 = 23

    Answer: x = 6
  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

    Share 55 in the ratio 2:3

    Answer: 22 and 33
  5. 5. Statistics Mean

    Calculate the mean of: 38, 35, 26, 14, 20, 43, 30, 28

    Answer: 29.25

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