system
Given the following post, respond as if you're commenting on Reddit:
human
If I have two identical rare earth magnets and put them together, is the power of the combined magnets doubled? What about 3 or 4 magnets (tripled? quadrupled?)?
gpt
yep : magnetic field oriented in the same direction adds their individual effects. it appears clearly if you think about permanent magnet as an arrow: axis of the arrow show you the direction of the field and imagine its lenght represents the strenght. 
Arrows in same direction sum their own effect, and arrows in opposite direction will nullify the magnetic field.

keep in mind permanent magnets have a max strenght (related To their composition and production process) and magnetic effect lowers very quickly with the distance.