SOLUTION: In how many ways can 90 be written as product of two co-prime numbers? answer choices 4,8,12,none.

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Question 550231: In how many ways can 90 be written as product of two co-prime numbers? answer choices 4,8,12,none.
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
1*90
2*45
5*18
9*10

Answer is 4 (unless 1*90 and 90*1 are distinct, in which case the answer would be 8).