Count, calculate, differentiate between odd and even numbers, recognize alphabet letters, sort vowels and consonants… While playing, children exercise with numbers and letters. 3 difficulty ...

After they ran out of alphabet, a small comma-like tail at the lower left of a letter between Α and Θ signified thousands—so ,BTKZ meant 2327. An M with a small letter or set of letters above ...

The Spanish alphabet includes the letter “x,” and early Catalan involved several pronunciations of it depending on context, including a pronunciation akin to the modern “sh.” ...

Like Roman numerals, their system borrowed letters; like the Arabic numerals we still use, it only needed one symbol for each decimal place. In the 6th century BCE, the Greek alphabet used 24 letters.