time and work : classifications and formula related are discussed

men days hours and work: basic formula and theory

calendars ; classification of years ,odd day calculation,odd days tables for a week and for years

clocks : description about clock and formula concerned

pipes and cisterns : various formula  and related theory 

time and distance and efficiency

profit and loss and discount

ages,averages 

all above topics discussion with suitable examples and assignment questions on all topics with key,pdf key downloadable