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Cornerstone · Grades 3–5 Keystones #1 30 April 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 April 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 6⁄8

    Answer: 19⁄12
  2. 2. Algebra Two-step equations

    Solve: 8x - 12 = 36

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

    Calculate the hypotenuse when a = 8cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 15.26cm
  4. 4. Ratio Sharing in a ratio

    Divide 90 in the ratio 1:4:4

    Answer: 10, 40 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 10, 29, 7, 11, 30, 25, 7

    Answer: 17

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