Subtract every number in turn from every other number, and we get 358
(twice), 716, 1,611, 1,253, and 895. Now, we see at a glance that, as
358 equals 2 × 179, the only number that can divide in every case
without a remainder will be 179. On trial we find that this is such a
divisor. Therefore, 179 is the divisor we want, which always leaves a
remainder 164 in the case of the original numbers given.