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Cornerstone · Grades 3–5 Keystones #1 16 March 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 March 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 3⁄5

    Answer: 31⁄35
  2. 2. Algebra Two-step equations

    Solve: 7x - 13 = 22

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 1:4

    Answer: 5 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 9, 29, 26, 15, 40, 42. Give your answer to 2 decimal places

    Answer: 26.83

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