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Cornerstone · Grades 3–5 Keystones #1 8 March 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 March 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 1⁄5

    Answer: 2⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x - 15 = 15

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 4:1

    Answer: 48 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 9, 46, 23, 8, 37, 16, 38. Give your answer to 2 decimal places

    Answer: 25.29

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