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Cornerstone · Grades 3–5 Keystones #1 22 April 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 April 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 1⁄5

    Answer: 33⁄40
  2. 2. Algebra Two-step equations

    Solve: 3x - 15 = 3

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 216 in the ratio 3:2:3

    Answer: 81, 54 and 81
  5. 5. Statistics Mean

    Calculate the mean of: 28, 5, 33, 43, 11, 18

    Answer: 23

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