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Cornerstone · Grades 3–5 Keystones #1 13 January 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄4

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x - 17 = 1

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 8.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 78 in the ratio 1:4:1

    Answer: 13, 52 and 13
  5. 5. Statistics Mean

    Calculate the mean of: 29, 22, 7, 28, 27, 44, 50. Give your answer to 2 decimal places

    Answer: 29.57

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