Sinhala numerals to record donations given by royals and other people who were belonged to the upper echelon of ancient Sinhala society to Buddhist temples. Brahmi numerals are ancestors of Arabic numerals which are used presently worldwide. Brahmi numerals had symbols for 10,100, and 1000. Number 1 and 10 in Brahmi have not been found in Sri Lanka up to now. Therefore, shapes of these two numerals have been hypothesized taking into consideration of shapes of Brahmi Number 1 and 10 found in India without physical evidence . Sinhala rock inscriptions suddenly become barren of numerals from A.D. 400 onwards. Tradition of
Arabic numerals 683 have also been found. The numeral system came to be known to the court of Baghdad, where mathematicians such as the Persian Al-Khwarizmi, whose book "On the Calculation with Hindu Numerals" was written about 825 in Arabic, and the Arab mathematician Al-Kindi, who wrote four volumes, "On the Use of the Indian Numerals" ("Ketab fi Isti'mal al-'Adad al-Hindi") about 830, propagated it in the Arab world. Their work was principally responsible for the diffusion of the Indian system of numeration in the Middle East and the West. In the 10th century, Middle-Eastern mathematicians extended the decimal numeral system to