Numbers 11–100

English regularizes; Hindi keeps inventing fused, irregular forms

This is a rare case where English is the tidy one. From twenty-one onward, English just states the tens word followed by the unit — twenty-one, thirty-two, forty-three — and that pattern repeats predictably all the way to ninety-nine. Hindi's numbers in this range are, by contrast, historically fused and irregular: इक्कीस (21), बाईस (22), and तेईस (23) don't transparently show बीस ('twenty') plus एक/दो/तीन the way you might expect — the tens and units have blended into a single word that has to be learned on its own, and this repeats freshly for every decade up to निन्यानवे (99). Where English lets you build twenty-one out of parts you already know, Hindi expects you to learn each number from eleven to ninety-nine close to individually — so lean on English's regularity here rather than looking for a Hindi shortcut.