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

Five GCSE retrieval questions · 5 April 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄7

    Answer: 20⁄21
  2. 2. Algebra Two-step equations

    Solve: 8x - 6 = 66

    Answer: x = 9
  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 50 in the ratio 2:3

    Answer: 20 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 49, 30, 13, 20, 46, 7, 6. Give your answer to 2 decimal places

    Answer: 24.43

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