abjad numerals alexander aitken algebraic number arabic numerals armenian numerals asterisk attic numerals babylonia babylonian numerals binary numeral system brahmi numeral charlemagne chepang chinese calendar chinese numerals circumference civilization composite number conrad stargard counting rods cube cyrillic numerals decimal decimal day diagonal dial diameter digit dozen earthly branches eastern arabic numerals egyptian numerals elvish languages english language english numerals equilateral triangle etruscan numerals germanic languages great britain greek numerals hebrew numerals height hexadecimal highly composite number hindu-arabic numeral system hour inch india indian numerals integer factorization irrational number irreducible fraction isaac pitman japanese numerals khmer numerals korean numerals least common multiple leo frankowski list of numeral system topics maya numerals minicoy island mongolian numerals multiplication table multiplicative inverse natural logarithm nepal nigeria number sign numeral system octal ounce positional notation pound sterling power of two prime factor prime number proto-germanic radix rational number rectangle roman numerals rounding senary sexagesimal shilling square number subitizing and counting suzhou numerals telephone thai numerals time transcendental number troy weight uncia urnfield culture numerals vigesimal zodiac