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Cornerstone · Grades 3–5 Keystones #1 12 January 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 January 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄9 + 3⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 7x - 15 = 48

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 6.4cm
  4. 4. Ratio Sharing in a ratio

    Share 42 in the ratio 3:4

    Answer: 18 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 16, 7, 9, 47, 35, 17, 17, 33. Give your answer to 2 decimal places

    Answer: 22.63

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