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Cornerstone · Grades 3–5 Keystones #1 21 July 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 July 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 5⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 7x - 9 = 89

    Answer: x = 14
  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 48 in the ratio 3:1

    Answer: 36 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 49, 45, 39, 5, 21, 25. Give your answer to 2 decimal places

    Answer: 30.67

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