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Cornerstone · Grades 3–5 Keystones #1 24 July 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 24 July 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄4

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

    Solve: 6x - 5 = 79

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 1:1:4

    Answer: 14, 14 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 23, 12, 21, 42, 26, 38, 28. Give your answer to 2 decimal places

    Answer: 27.14

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