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Cornerstone · Grades 3–5 Keystones #1 29 September 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 29 September 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 1⁄5

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

    Solve: 8x - 15 = 65

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

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 68 in the ratio 1:3

    Answer: 17 and 51
  5. 5. Statistics Mean

    Find the mean of: 14, 12, 23, 7, 9

    Answer: 13

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