Question

what is the co pirm number =45
a)54
b)64
c)72
d)40
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Answer 1

Answer:

d) 40

i hope it is correct

Answer 2

(B). 64


Explanation:-

(1.) 54 — it has 2 commom factors.
(2.) 72– it has 1 common factor.
(3.). 40— it has 1 common factor.
(4.) 64– it has no common factor means it is a co prime no.