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Cornerstone · Grades 3–5 Keystones #1 23 July 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 5⁄6

    Answer: 31⁄30
  2. 2. Algebra Two-step equations

    Solve: 4x + 11 = 39

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 7.21cm
  4. 4. Ratio Sharing in a ratio

    Divide 208 in the ratio 4:1:3

    Answer: 104, 26 and 78
  5. 5. Statistics Mean

    Calculate the mean of: 41, 28, 42, 27, 14, 47. Give your answer to 2 decimal places

    Answer: 33.17

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