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Cornerstone · Grades 3–5 Keystones #1 21 February 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 21 February 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

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

    Solve: 3x + 12 = 33

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 4:2:3

    Answer: 56, 28 and 42
  5. 5. Statistics Mean

    Calculate the mean of: 14, 42, 29, 33, 46, 40, 49, 19

    Answer: 34

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