Library / /31 of 297

, 2016

Algebra Difficulty 1.1 Junior Find the answer Canada

Numbers $m$ and $n$ are on the number line, as shown.

The value of $n-m$ is

Pick one

Solution

Since each of the five $1 \times 1$ squares has area 1, then the shaded area is 2.

Since the total area is 5, the percentage that is shaded is $\frac{2}{5} = 0.4 = 40\%$ .

Want a route through all this instead of an archive? The track puts 2,444 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.