3

Month 4 starts out with two rabbits (the number under month 3) one of which is mature (the number under month 2). During the month the mature rabbit gives birth to another baby. The chart shows the total of three rabbits at the end of the month.

Month 5 starts out with three rabbits (the number under month 4) two of which are mature (the number under month 3). During the month the mature rabbits give birth to one baby each. The chart shows the total of five rabbits at the end of the month.

N | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |

Rabbits | 1 | 1 | 2 | 3 | 5 |

The total number of female rabbits at the start of a month
is shown under the previous month in the chart.
The number of __mature__ rabbits
(which give birth during that month)
is the number shown under the second previous month.