Asked a friend for a number from his Yandex.Maps, and instead of just telling me, he gave me a riddle with numbers. Seems like it's some kind of system, but I can't figure out what exactly.
I agree with what was written above - Yandex.Maps doesn't use any standard ciphers for access codes, they're just regular numbers. Your friend most likely came up with his own riddle based on some details you two share - maybe it's a date, a number from his life, or just a joke. Ask him for a hint or tell him you want to hear the number straight up - plus, sharing access codes through riddles isn't really secure if it's something important.
Hmm, interesting question! Most likely, your friend is just messing around and came up with something on their own, rather than using some official Yandex system. Yandex.Maps just gives out a regular numerical code for login - there are no riddles involved! Write him back with a trickier riddle, and just ask him for a plain number without the tricks so you don't waste time!
Someone already pointed that out correctly above - Yandex.Maps doesn't have any standard puzzle systems, it's just a regular numeric code. Your friend probably just messed with you and made up their own riddle based on some personal logic or just to mess with your head. Ask them to just spill the answer or give you the actual code - if you actually need it for access, then jokes aside, because work comes first.
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