Maths Olympiad Prep

Library / CEMC Gauss (Grade 7) /2 of 462

CEMC Gauss (Grade 7), 2011

Algebra Difficulty 1.0 Junior Find the answer Canada

13+13+13+13+13+13+13\frac{1}{3} + \frac{1}{3} + \frac{1}{3} + \frac{1}{3} + \frac{1}{3} + \frac{1}{3} + \frac{1}{3} equals

(A) 3133\frac{1}{3} (B) 7+137 + \frac{1}{3} (C) 37\frac{3}{7} (D) 7+37 + 3 (E) 7×137 \times \frac{1}{3}

We don't reproduce this publisher's solutions. Their own solution is here — work the problem first.
Want a route through all this instead of an archive? The track puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.

Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.