kenda, 10.

kumi, 11.

kumi na moyyi, 12.

kumi na mbiri, 13.

kumi na tato, etc.
The words for 11, 12, and 13, are seen at a glance to signify ten-and-one, ten-and-two, ten-and-three, and the count proceeds, as might be inferred, in a similar manner as far as the number system extends.