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Cornerstone · Grades 3–5 Keystones #1 24 November 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 24 November 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄4

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 3x - 6 = 33

    Answer: x = 13
  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 175 in the ratio 1:2:4

    Answer: 25, 50 and 100
  5. 5. Statistics Mean

    Calculate the mean of: 46, 42, 10, 50, 29, 47. Give your answer to 2 decimal places

    Answer: 37.33

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