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Cornerstone · Grades 3–5 Keystones #1 14 December 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 December 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 4⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x - 13 = 23

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 20 in the ratio 1:3

    Answer: 5 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 49, 46, 20, 20, 6, 13. Give your answer to 2 decimal places

    Answer: 25.67

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