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

  1. 1. Number Adding fractions

    Add: 7⁄8 + 2⁄5

    Answer: 51⁄40
  2. 2. Algebra Two-step equations

    Solve: 2x - 19 = -7

    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 98 in the ratio 4:2:1

    Answer: 56, 28 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 11, 24, 34, 39, 47, 16

    Answer: 28.5

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