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Cornerstone · Grades 3–5 Keystones #1 7 October 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 7 October 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 3⁄7

    Answer: 19⁄28
  2. 2. Algebra Two-step equations

    Solve: 5x - 18 = 17

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

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 140 in the ratio 4:2:1

    Answer: 80, 40 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 42, 9, 43, 18, 24, 15. Give your answer to 2 decimal places

    Answer: 25.17

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