29. The numbers $1, 2, 3, 4, 5, 6, 7, 8, 9, 0$ that we use for counting are called Arabic numerals, and they have become the universal symbols for numbers used around the world. Arabic numerals were actually invented by the ancient $\qquad$.
A. Indians
B. China
C. Babylon
D. Arabs
【Answer】A
【Analysis】Arabic numerals are a set of numerical symbols used internationally, which are $0,1,2,3,4$, 5, 6, 7, 8, 9, a total of 10 counting symbols. These ten numerical symbols are conventional notations adopted for counting and arithmetic operations, known as Arabic numerals. Arabic numerals were not invented by the Arabs, but by ancient Indians, and were eventually transmitted to Europe by the Arabs, hence the misnomer “Arabic numerals”.