math of reproduction

Slashdot | Review: Matrix: Reloaded: "About 12 people reproducing into 250,000 people so quickly: yes this is possible. if each woman produced as many children as could be done healthily, say 10, you could do it in 4 new generations:

7 women * 10 children = 70 new ppl.
70 * 0.5 (50% girls) * 10 children = 350 new ppl.
350 *0.5 *10 = +1750 ppl.
8750 *0.5*10 = +43750 ppl.
218750 *0.5*10 = +218750 ppl.

12 + 70 + 350 + 1750 + 43750 + 218750
= 273,420 ppl.

Figure the early generation eventually dies off, and some other die off as well, you could get close to 250k easily in 100 years.

Assuming the first 12 are near child-bearing age when they start, and the bulk of the ppl get the reproducing done around age 25, 25*4 = 100 years."