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Cornerstone · Grades 3–5 Keystones #1 3 November 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 3 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 2⁄4

    Answer: 13⁄10
  2. 2. Algebra Two-step equations

    Solve: 4x + 5 = 25

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

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 2:1

    Answer: 40 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 28, 46, 27, 15, 19, 29, 13, 30. Give your answer to 2 decimal places

    Answer: 25.88

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