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Cornerstone · Grades 3–5 Keystones #1 21 June 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 21 June 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 3⁄5

    Answer: 51⁄35
  2. 2. Algebra Two-step equations

    Solve: 8x - 19 = 85

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 138 in the ratio 1:4:1

    Answer: 23, 92 and 23
  5. 5. Statistics Mean

    Calculate the mean of: 7, 25, 7, 47, 50, 6, 27. Give your answer to 2 decimal places

    Answer: 24.14

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