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Cornerstone · Grades 3–5 Keystones #1 23 October 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 3⁄5

    Answer: 41⁄35
  2. 2. Algebra Two-step equations

    Solve: 3x + 6 = 33

    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 84 in the ratio 1:2

    Answer: 28 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 24, 45, 26, 50, 39, 41, 30. Give your answer to 2 decimal places

    Answer: 36.43

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