Monster Standard 100 -50' - Speak-On to Straight 1/4" Plugs

good day everyone and welcome to the canadian math kangaroo contest mini enrichment class this time on strategy problems for grade five today we will be learning about strategy problems that don't have a ready-made algorithm or procedure to solve them these problems might require us to come up with a specific strategy and this strategy in most cases will be informed by what we see in the problem itself we'll be doing a little bit of creative work today i think we will also illustrate the process of creating these strategies we will try wherever possible to make a strategy generalizable that is one that might help you in the future should you encounter a similar problem up ahead let's jump straight in and get started suppose bazel is encrypting or ciphering numbers using the following rules he increases each even digit by 1 and decreases each odd digit by 1. so for example the number 489