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Cornerstone · Grades 3–5 Keystones #1 25 February 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 25 February 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x + 3 = 51

    Answer: x = 8
  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 88 in the ratio 1:2:1

    Answer: 22, 44 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 28, 40, 5, 23, 12, 25. Give your answer to 2 decimal places

    Answer: 22.17

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