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Cornerstone · Grades 3–5 Keystones #1 29 December 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 29 December 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 2⁄3

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

    Solve: 7x + 7 = 28

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 102 in the ratio 3:2:1

    Answer: 51, 34 and 17
  5. 5. Statistics Mean

    Calculate the mean of: 50, 37, 41, 33, 24, 33, 27

    Answer: 35

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