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Cornerstone · Grades 3–5 Keystones #1 8 October 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 October 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x - 5 = 73

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

    Calculate the hypotenuse when a = 10cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 15.62cm
  4. 4. Ratio Sharing in a ratio

    Divide 90 in the ratio 3:4:2

    Answer: 30, 40 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 35, 45, 15, 43, 26, 31, 14, 34. Give your answer to 2 decimal places

    Answer: 30.38

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