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Cornerstone · Grades 3–5 Keystones #1 20 June 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 June 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄10 + 3⁄10

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 4x - 11 = 45

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 54 in the ratio 2:1

    Answer: 36 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 5, 34, 47, 44, 35, 30, 11. Give your answer to 2 decimal places

    Answer: 29.43

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