Library / UKMT Senior Mathematical Challenge /22 of 212

UKMT Senior Mathematical Challenge, 2020

Number theory Difficulty 1.0 Junior Find the answer United Kingdom

What is the remainder when $1234 \times 5678$ is divided by 5?

(A) $0$ (B) $1$ (C) $2$ (D) $3$ (E) $4$

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: UK Mathematics Trust, licensed © UK Mathematics Trust; past papers published free at ukmt.org.uk. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.