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Cornerstone · Grades 3–5 Keystones #1 27 May 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 27 May 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 1⁄12

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

    Solve: 5x + 13 = 53

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 216 in the ratio 2:3:3

    Answer: 54, 81 and 81
  5. 5. Statistics Mean

    Calculate the mean of: 9, 44, 24, 10, 12, 38, 39. Give your answer to 2 decimal places

    Answer: 25.14

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