Two pronunciations: juǎn (to roll, 3rd tone) and juàn (volume/exam paper, 4th tone). 试卷 (shìjuàn, exam paper), 卷子 (juànzi, test paper) use 4th tone.
culture
内卷 (nèijuǎn, 'involution') became huge internet slang around 2020, meaning toxic competition where everyone works harder but nobody benefits. The opposite trend is 躺平 (tǎng píng, 'lying flat').