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Cornerstone · Grades 3–5 Keystones #1 12 January 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄10 + 3⁄10

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

    Solve: 3x + 7 = 25

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 144 in the ratio 1:4:1

    Answer: 24, 96 and 24
  5. 5. Statistics Mean

    Find the mean of: 13, 15, 10, 7, 15

    Answer: 12

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