I teach English as a second language. In my kids' classes, I sometimes have competitions in order to motivate my students. For one competition, I'm planning on offering monetary prizes: KRW 1,000 for first place, KRW 100 for second place, and KRW 10 for third place.
What is this kind of sequence called? I'm thinking it's logarithmic, but I'm not sure. It's been a long time since I've studied any kind of math.