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Cornerstone · Grades 3–5 Keystones #1 20 June 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 20 June 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄8 + 4⁄8

    Answer: 5⁄8
  2. 2. Algebra Two-step equations

    Solve: 3x + 3 = 30

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

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 51 in the ratio 2:1

    Answer: 34 and 17
  5. 5. Statistics Mean

    Calculate the mean of: 33, 9, 31, 17, 43, 11, 19. Give your answer to 2 decimal places

    Answer: 23.29

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