Khmer numerals
... that Khmer numerals were the first material evidence of the figure zero as a numerical figure?
... that <b id="mwDvU"><a href="./Khmer_numerals" id="mwDvY" rel="mw:WikiLink" title="Khmer numerals">Khmer numerals</a></b> were the first material evidence of the figure <a class="mw-redirect" href="./Zero#Zero_as_a_decimal_digit" id="mwDvc" rel="mw:WikiLink" title="Zero">zero as a numerical figure</a>?