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

Five GCSE retrieval questions · 1 December 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄8 + 3⁄5

    Answer: 11⁄10
  2. 2. Algebra Two-step equations

    Solve: 8x - 20 = 68

    Answer: x = 11
  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 84 in the ratio 2:1

    Answer: 56 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 17, 31, 18, 18, 6, 32, 23. Give your answer to 2 decimal places

    Answer: 20.71

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