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Cornerstone · Grades 3–5 Keystones #1 25 March 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 March 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄6 + 2⁄6

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 4x + 13 = 45

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 72 in the ratio 2:1

    Answer: 48 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 40, 14, 23, 45, 31, 19, 5. Give your answer to 2 decimal places

    Answer: 25.29

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