HSK C4/W3
Correct

陆

/ lù / 
Strokes

Definition

six (banker's anti-fraud numeral)

Example

As a Numeral
six ［used for the numeral六on cheques, etc to avoid mistakes or alterations］
1
Lùbǎi
陆百
lù
陆
shè
拾
lù
陆

six hundred and sixty-six