The three-day event, which was hosted by The Armidale School (TAS), had students from 15 public, independent and Catholic schools attend.

The students worked in teams of eight and battled their way through challenges across 10 disciplines: mathematics, English, science, code breaking, engineering, ideation, creative producer, art and poetry, cartography and general knowledge.

In each challenge was this year's underlying theme, 'balance'.

Regardless of the challenge, students had to must their combined brainpower to come up with a solution.

Year 6 TAS student Charlie Ross said of all the challenges, the engineering task was his favourite.

"We had to make scales from straws, paper, string and sticky tape," Charlie said.

"Initially the straw was too long so we had to experiment to get it the right length.

"It was very rewarding when we came second in that challenge."

Fellow TAS student Millie Coupland said there was a "great atmosphere".

"It was challenging, but entertaining and good to work in a team," Millie said.

"We all really liked the fact that a lot of what we did in challenges like maths, was very different to what we do in the classroom, which made it even more fun."

The three-day event was broke up in to year groups, with years 5 and 6 competing on one day, followed by years 7 and 8, then years 9 and 10.

Schools from Armidale, Inverell, Tamworth, Bellingen, Coffs Harbour, Narrabri and Glen Innes took part in this year's Decathlon, with the ultimate results shared across the region.

Armidale City Public School took out first place in year 5, while Carinya Christian School won year 6 and year 10. Calrossy Anglican School took out both year 7 and year 9.

Armidale Secondary College came first in the year 8 category.

While TAS didn't take out pole position, it did take home third in year 6, year 7, year 9 and second place in year 10.