Question

Female rabbits are either juvenile
or adult. Each month, each juvenile
grows to adulthood and each adult
female gives birth (on average) to
one juvenile female. Starting with
one juvenile female rabbit, how
many female rabbits will there be
after 10 months ?

Answer 1

Answer = 144

You can see a pattern here the number of adults in first month are the number of juveniles in the next month and the number of juveniles + the number of adults in the first month is the number of adults in second month