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Cornerstone · Grades 3–5 Keystones #1 9 February 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 9 February 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x + 12 = 72

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

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 63 in the ratio 3:4

    Answer: 27 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 26, 11, 25, 21, 20, 30, 26, 33

    Answer: 24

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