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Cornerstone · Grades 3–5 Keystones #1 8 July 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 2⁄5

    Answer: 29⁄35
  2. 2. Algebra Two-step equations

    Solve: 6x + 4 = 70

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 100 in the ratio 1:4

    Answer: 20 and 80
  5. 5. Statistics Mean

    Calculate the mean of: 42, 50, 34, 45, 10, 11, 23. Give your answer to 2 decimal places

    Answer: 30.71

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