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Cornerstone · Grades 3–5 Keystones #1 16 May 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 May 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 3⁄5

    Answer: 49⁄40
  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 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 77 in the ratio 2:4:1

    Answer: 22, 44 and 11
  5. 5. Statistics Mean

    Find the mean of: 2, 16, 7, 11

    Answer: 9

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