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Cornerstone · Grades 3–5 Keystones #1 15 December 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 15 December 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄9 + 2⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 6x - 11 = 25

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 176 in the ratio 1:2:1

    Answer: 44, 88 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 23, 49, 31, 36, 25, 32, 48. Give your answer to 2 decimal places

    Answer: 34.86

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