21:["$","div",null,{"data-slot":"card","className":"bg-card text-card-foreground flex flex-col gap-6 rounded-xl border py-6 shadow-sm w-full max-w-4xl mx-auto hover:shadow-lg hover:border-primary/50 transition-all duration-200 cursor-pointer","children":[["$","div",null,{"data-slot":"card-header","className":"@container/card-header grid auto-rows-min grid-rows-[auto_auto] items-start gap-2 px-6 has-data-[slot=card-action]:grid-cols-[1fr_auto] [.border-b]:pb-6","children":["$","div",null,{"className":"flex justify-between items-start gap-4","children":[["$","div",null,{"className":"space-y-1","children":[["$","div",null,{"data-slot":"card-title","className":"text-xl font-bold hover:text-primary transition-colors","children":"Putnam 1955 A4"}],["$","p",null,{"className":"text-sm text-muted-foreground","children":["Source: ",""]}]]}],["$","div",null,{"className":"text-xs text-muted-foreground whitespace-nowrap","children":"5/23/2022"}]]}]}],["$","div",null,{"data-slot":"card-content","className":"px-6 space-y-4","children":["$","div",null,{"className":"prose dark:prose-invert max-w-none","children":["$","div",null,{"className":"latex","children":["$","span",null,{"className":"__Latex__","dangerouslySetInnerHTML":{"__html":"On a circle,

n

points are selected and the chords joining them in pairs are drawn. Assuming that no three of these chords are concurrent (except at the endpoints), how many points of intersection are there?\n"}}]}]}]}],["$","div",null,{"data-slot":"card-footer","className":"items-center px-6 [.border-t]:pt-6 flex flex-wrap gap-2","children":[["$","span","Putnam",{"data-slot":"badge","className":"inline-flex items-center justify-center rounded-full border px-2 py-0.5 text-xs font-medium w-fit whitespace-nowrap shrink-0 [&>svg]:size-3 gap-1 [&>svg]:pointer-events-none focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive transition-[color,box-shadow] overflow-hidden border-transparent bg-secondary text-secondary-foreground [a&]:hover:bg-secondary/90","children":"Putnam"}]]}]]}]

A4

Problems(1)