Library / / 90 of 297
, 2021 Difficulty 1.4 Junior Find the answer Canada
If m + 1 = n − 2 3 m+1 = \dfrac{n-2}{3} m + 1 = 3 n − 2 3 m − n 3m - n 3 m − n
Pick one
A − 1 -1 − 1 B − 5 -5 − 5 C − 3 -3 − 3 D − 9 -9 − 9 E − 7 -7 − 7
Solution Since m + 1 = n − 2 3 m+1 = \dfrac{n-2}{3} m + 1 = 3 n − 2 3 ( m + 1 ) = n − 2 3(m+1) = n-2 3 ( m + 1 ) = n − 2
This means that 3 m + 3 = n − 2 3m + 3 = n - 2 3 m + 3 = n − 2 3 m − n = − 2 − 3 = − 5 3m - n = -2 - 3 = -5 3 m − n = − 2 − 3 = − 5
← Previous Browse the library Next →
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.