What are Arabic numerals?
Arabic numerals refers to the ten digits commonly used today to represent numbers.  The digits are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.  They were adopted by European mathematicians around the 10th century C.E. from numerals used by Arabic speakers in North Africa.  The numerals are used in a positional or place-value notation which makes complex calculations by humans easier.