A good answer might be:

The one mature female rabbit gave birth to one baby female rabbit at the beginning of the month. So there is a total of two female rabbits (and several males).

End of the Third Month

The new chart shows this. The entry under month 3 shows the total number of rabbits at the end of that month. There are: 1 mature rabbit and 1 baby rabbit which is one month old.

If you look under month 2 you see how many mature female rabbits there are at the end of month 3.

N12345 678910
Rabbits112        

 

QUESTION 11:

How many rabbits are there at the end of month 4?