Bangla numbers 50 to 59 (পঞ্চাশ থেকে ঊনষাট)

A decade whose numbers do not resemble their own decade word. পঞ্চাশ is fifty, but 51 to 58 all end in -আন্ন: একান্ন, বাহান্ন, তিপ্পান্ন, চুয়ান্ন. Knowing পঞ্চাশ tells you nothing about how to say fifty-three, which is why this decade catches people who thought they had found the system.