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Cornerstone · Grades 3–5 Keystones #1 10 December 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄8 + 1⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 8x - 9 = 87

    Answer: x = 12
  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

    Share 54 in the ratio 2:1

    Answer: 36 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 19, 48, 46, 48, 28, 36

    Answer: 37.5

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