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Cornerstone · Grades 3–5 Keystones #1 2 July 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 2⁄8

    Answer: 11⁄28
  2. 2. Algebra Two-step equations

    Solve: 8x - 6 = 82

    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

    Divide 216 in the ratio 4:4:1

    Answer: 96, 96 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 47, 30, 26, 40, 32, 19, 42. Give your answer to 2 decimal places

    Answer: 33.71

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