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Cornerstone · Grades 3–5 Keystones #1 28 January 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 28 January 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 3⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x - 13 = -5

    Answer: x = 4
  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

    Divide 156 in the ratio 3:2:1

    Answer: 78, 52 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 16, 9, 24, 47, 10, 29, 16. Give your answer to 2 decimal places

    Answer: 21.57

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