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Cornerstone · Grades 3–5 Keystones #1 16 January 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 16 January 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 2⁄6

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

    Solve: 5x - 13 = 57

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

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

    Divide 112 in the ratio 4:2:1

    Answer: 64, 32 and 16
  5. 5. Statistics Mean

    Find the mean of: 12, 17, 13, 12, 16

    Answer: 14

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