If you are referring to a brass monkey - a device for holding cannon balls - it could have two, three or four arms, but if you are referring to a live monkey, most would have two arms, unless they have lost one or both.
2
2 and 2 arms
made like that
Two arms and two legs.
A monkey, like all apes, has two legs and two arms.
each monkey has 2 legs and 2 arms, making a total of 4 legs and 4 arms :)
22 if you count the monkey with 2 legs and 2 arms
Monkeys have two legs and two arms.
not yet
22. (Unless you count the monkey's arms as legs, then it would be 24.)
A monkey
About 35cm on the average monkey