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Cornerstone · Grades 3–5 Keystones #1 26 February 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 February 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 3⁄5

    Answer: 26⁄35
  2. 2. Algebra Two-step equations

    Solve: 8x - 14 = 98

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 13.04cm
  4. 4. Ratio Sharing in a ratio

    Divide 200 in the ratio 3:3:4

    Answer: 60, 60 and 80
  5. 5. Statistics Mean

    Calculate the mean of: 40, 18, 50, 42, 10, 12, 20. Give your answer to 2 decimal places

    Answer: 27.43

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