[INST] When the base-12 integer 1531_12 is divided by 8, what is the remainder?/n [/INST]  ###Response: To find the remainder when the base-12 integer 1531_12 is divided by 8, we can first convert it to base 10:

1531_12 = 1 * 12^3 + 5 * 12^2 + 3 * 12 + 1 
        = 1728 + 720 + 36 + 1
        = 2485

Since 12^2 is divisible by 8, we can simplify:

1531_12 = 8 * (12^2 + 5) + 3 * 12 + 1

Therefore, the remainder upon dividing 1531_12 by 8 is the same as the remainder upon dividing 3 * 12 + 1 by 8, which is 5.