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Cornerstone · Grades 3–5 Keystones #1 1 April 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 1 April 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 2⁄5

    Answer: 37⁄30
  2. 2. Algebra Two-step equations

    Solve: 5x - 8 = 57

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 55 in the ratio 1:4

    Answer: 11 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 49, 33, 30, 47, 17, 18. Give your answer to 2 decimal places

    Answer: 32.33

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