Library / UKMT Grey Kangaroo /131 of 242

UKMT Grey Kangaroo, 2021

Combinatorics Difficulty 2.0 Junior Find the answer United Kingdom

When the five pieces shown are fitted together correctly, the result is a rectangle with a calculation written on it. What is the answer to this calculation?

(A) $-100$ (B) $-8$ (C) $-1$ (D) $199$ (E) $208$

Figure for this problem

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.