div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=1cdnedlio-analyzing-numerical-data-validating-identification-numbers-htmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: 1cdnedlio€¦ · Analyzing Numerical Data: Validating Identification Numbers Credit cards have 16-digit numbers of which the first 15 digits identify the credit card loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader030vdocumentinreader030viewer20220202145b1666b17f8b9a4f6d8bbdc6html5thumbnails1jpg width=140 height=200 divdiv