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Cornerstone · Grades 3–5 Keystones #1 14 June 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 14 June 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 3⁄5

    Answer: 49⁄40
  2. 2. Algebra Two-step equations

    Solve: 3x - 8 = 22

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

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

    Divide 144 in the ratio 2:1:1

    Answer: 72, 36 and 36
  5. 5. Statistics Mean

    Find the mean of: 12, 3, 12

    Answer: 9

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