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

  1. 1. Number Adding fractions

    Add: 2⁄3 + 3⁄5

    Answer: 19⁄15
  2. 2. Algebra Two-step equations

    Solve: 2x - 18 = 4

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 33 in the ratio 2:1

    Answer: 22 and 11
  5. 5. Statistics Mean

    Calculate the mean of: 33, 38, 40, 24, 38, 27. Give your answer to 2 decimal places

    Answer: 33.33

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