Question

MODULAR ARITHMETIC

If it is 9 o'clock now,what will it be in 111
hours .

Answer 1

Answer:

12 o'clock.

Step-by-step explanation:

As we are talking time we work in mod 12.

9 mod12 + 111 mod12

= (9 + 111) mod12

= 120 mod 12

= 0.

So the time will be 12 o'clock.