self Maths Puzzle

Whats special in the following words..

AUTHORITIES, AUTHORIZE, AUTHENTICATION, PRECAUTION

Read Solution (Total 1)

self Other Question

In a stable there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable complete the series:
3, 35, 99, 195, 323,___, ___