Question: How old was the man for whom Āryabhaṭa numeration is named when he wrote Āryabhaṭīya?
Sentence (from "Āryabhaṭa numeration"): It attributes a numerical value to each syllable of the form consonant+vowel possible in Sanskrit phonology, from "ka " = 1 up to "hau " = 10.
Relevant evidence: No