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Cornerstone · Grades 3–5 Keystones #1 29 January 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 29 January 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄10 + 1⁄10

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 5x + 13 = 58

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 42 in the ratio 4:3

    Answer: 24 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 37, 10, 19, 20, 19, 18, 18. Give your answer to 2 decimal places

    Answer: 20.14

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