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

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

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

    Solve: 4x + 3 = 43

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

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 102 in the ratio 3:1:2

    Answer: 51, 17 and 34
  5. 5. Statistics Mean

    Find the mean of: 20, 5, 8

    Answer: 11

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