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Cornerstone · Grades 3–5 Keystones #1 17 June 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 17 June 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄9 + 1⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 3x - 9 = 36

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 1:4

    Answer: 5 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 20, 48, 37, 5, 19, 6, 48, 26. Give your answer to 2 decimal places

    Answer: 26.13

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