Question

90,45 l.c m
$9045lcm$
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Answer 1

Heya mate !
90 is the answer.
It can be determined easily , as 45 is divisible by 90.
But if you require the whole process then refer to the attachment.
Hope it helps you mate...
Regards !!!

Answer 2

LCM of 90and 45is 90

90=9*5*2

45=9*5

so LCM =9*5*2=90

hope this answer useful to you