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

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

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 1⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 6x + 9 = 63

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

    Calculate the hypotenuse when a = 8cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 10.63cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 1:4:2

    Answer: 12, 48 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 14, 42, 29, 42, 24, 50, 35. Give your answer to 2 decimal places

    Answer: 33.71

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