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Cornerstone · Grades 3–5 Keystones #1 22 January 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 January 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 4⁄7

    Answer: 19⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x + 9 = 33

    Answer: x = 8
  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

    Share 105 in the ratio 3:4

    Answer: 45 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 38, 16, 14, 47, 13, 39. Give your answer to 2 decimal places

    Answer: 27.83

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