Castaways must race out to a series of stations, with a certain number of objects at each station. When they count the objects, they would return to their station and use the numbers to open a series of combination locks. The first person to finish would win.
The challenge was used again as the Immunity Challenge for the final six of Survivor: Cagayan. After 25 minutes of tries and failures, Spencer Bledsoe got his numbers right and won immunity, ending Tasha Fox's streak of Immunity Challenge victories.
"Call the Whambulence!"
"Two Brains Are Better than One"
"Havoc to Wreak"
- In its first use in Survivor: Panama, the challenge incorporated elements of the End of the Line challenge.
- All three winners of this challenge were the youngest man of their respective season and the youngest person left in the competition.
- Both times the challenge was used at the final six, it was for individual immunity.
- Every time this challenge was used, a woman was eliminated at the following Tribal Council.