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Cornerstone · Grades 3–5 Keystones #1 28 September 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 September 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄5 + 2⁄6

    Answer: 14⁄15
  2. 2. Algebra Two-step equations

    Solve: 6x - 7 = 59

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 11.66cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 2:3

    Answer: 18 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 20, 26, 31, 33, 32, 23

    Answer: 27.5

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