Answer:
Step-by-step explanation:
co-prime is when ur numbers have no common factors other then 1.
(a) 18 and 35....this is co-prime
(b) 15 and 37....this is co-prime
(c) 30 and 415....not co-prime....common factor of 5
(d) 17 and 68...not co-prime....common factor of 17
(e) 216 and 215.....this is co-prime
(f) 81 and 16....this is co-prime
