Every one of the cardinal numbers can be based on several different compound numbers. The 7, for instance, can be based on 16, 25, 34, 43, 52, 61, or 70. (It cannot be based on 79 or 88 except indirectly, because 79 and 88 are 16.) When a 7 is based on 25, it is slightly different from a 7 based on 34...