Library / /318 of 413

, 2000

Number theory Difficulty 2.0 Junior Find the answer Canada

The prime numbers between $10$ and $20$ are added together to form the number $Q$ . What is the largest prime divisor of $Q$ ?

(A) $2$ (B) $3$ (C) $5$ (D) $7$ (E) $11$

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.