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Cornerstone · Grades 3–5 Keystones #1 13 March 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 13 March 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 1⁄12

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 4x - 13 = 39

    Answer: x = 13
  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

    Divide 108 in the ratio 4:4:1

    Answer: 48, 48 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 30, 25, 17, 42, 12, 40, 21, 30. Give your answer to 2 decimal places

    Answer: 27.13

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