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Cornerstone · Grades 3–5 Keystones #1 14 January 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 January 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 6⁄8

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 6x + 13 = 43

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 72 in the ratio 1:1:4

    Answer: 12, 12 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 11, 5, 11, 43, 22, 5. Give your answer to 2 decimal places

    Answer: 16.17

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