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Cornerstone · Grades 3–5 Keystones #1 28 February 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 28 February 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 4⁄5

    Answer: 21⁄20
  2. 2. Algebra Two-step equations

    Solve: 5x - 18 = 2

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

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

    Divide 92 in the ratio 2:1:1

    Answer: 46, 23 and 23
  5. 5. Statistics Mean

    Find the mean of: 9, 2, 17, 18, 9

    Answer: 11

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