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Cornerstone · Grades 3–5 Keystones #1 8 February 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 2⁄4

    Answer: 5⁄8
  2. 2. Algebra Two-step equations

    Solve: 7x + 15 = 99

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 6cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 48 in the ratio 3:1

    Answer: 36 and 12
  5. 5. Statistics Mean

    Find the mean of: 11, 15, 19, 11

    Answer: 14

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