Along with their calendars -- the Tzolk'in, the Haab and the Long Count -- the Mayans also created their own math system. They used a series of dots and bars to signify numbers. One dot equaled one unit, while one bar equaled five units. A shell symbol signified zero.
Nullarbor is bounded in the west by the Western Australia-South Australian state border, in the south by the coastline adjoining the Great Australian Bight, to the east by the localities of Yalata and Yellabinna and to the north by the Trans-Australian Railway.ullarbor is located within the federal Division of Grey, the state electoral districts of Flinders and Giles, and the unincorporated area of South Australia.
The Barakar is the most important tributary of the Damodar. It originates near Padma in Hazaribagh district and flows through Jharkhand before meeting the Damodar near Dishergarh in West Bengal.The Damodar and the Barakar trifurcates the Chota Nagpur plateau.amodar River was earlier known as the River of Sorrows as it used to flood many areas of Bardhaman, Hooghly, Howrah and Medinipur districts.