The Stellar Journey of Bewilderment (Impossible Riddles)

In an age where AI can solve (almost) anything, these riddles still remain stumpers. Feel free to use whatever you want: Google, ChatGPT, the comment section...
You may want to try to solve them without the timer. Feel free to start after solving.
This is my rendition of Dimby's The Impossible Quiz.
Quiz by Dollyfroggy
Last updated: October 6, 2023
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First submittedOctober 6, 2023
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You are traveling to see something. It's the only word that is over 3 letters long and has every other letter as "y". What is it?
At one point, you find a sign reading "Ali, Olivia, Wanda, and so on... only one will appear twice". What is the one that will appear twice?
You look past your shoulder to find a mysterious wizard. He approaches you to say that he goes by Valend. Valend shares a cryptic puzzle:
"3/2 4/4 11/2
13/1 1/2 2/3
8/1 19/1 2/1 5/7
14/1 6/2
18/4 12/5 20/3 21/1 9/5
6/1 5/2 10/2 3/3?

10/2 7/1
1/1 2/2 4/3
10/1 7/2 3/3 11/1
7/1 4/2 4/4
3/4 5/2 11/2
3/2 20/5 5/1 10/1 9/5 5/8
7/2 6/1
9/7 15/1
14/1 5/8 10/2 21/1 7/2 3/2 2/1"
The wizard Valend then reveals he had just come from the year 1000. He shares the following:

"Are you able to solve this? A country boasted a flag akin to a ritual for Eloh Araphel. Do you know which?"
The mention of the year 1000 brings up a question that's been haunting you. What is 1000 in bijective hexavigesimal using no numerals?
Valend shares a final message. "I'll let you in on a secret. Valend's actually a short name. You can lengthen it a few ways by adding specific letters between." He pauses. "Take the V and A, for instance. You could make it VIA or VBA. And right now, YOU are taking a QSUIBNCCDZ. Convenient how YOU doesn't need any letters between the letters, huh?"

Valend ponders this before asking his question. "So what would one of my full names be?"

He's about to leave you with this when he decides to add, "You won't be finding any W or X, by the way."
As he leaves, you spy some text on the back of his shirt. It says something like, "I'm so cool that there is a municipality whose name contains mine—but they spelled my name wrong." What is this referring to?
In front of you lays a short teetering bridge. In its heyday, it likely had as many as 14 stepping points, but now only 5 or 6 remain (both are equally likely).

Whenever you take a step forward on the bridge, there is a 50% chance the bridge creaks. To be safe, you return to the start promptly after the bridge creaks unless you are on the last step.

What is the estimated number of times you will need to step on the bridge before making it across? Express your answer as a decimal.
You are nearing your destination when you stumble across 31 trees. Each are labelled, although it is hard to make out anything. One reads "Sat...", one seems to be a three-digit number, and all but seven are only one word long. Only one of them is three words long. A handful are countries. What does it say?
As you have nearly reached your destination, you find a sign reading:
1 53
There is another beside it.
90 A 7 19 39 8 92, 67 15 63 1 AD 9 92 7

What does it say?
Level 77
Oct 6, 2023
Love the title. I will try to some of it in the next few days when I have time.
Level 60
Oct 6, 2023
Alright, let me know if you want any hints.
Level 33
May 21, 2024
I got 0/10 :\\ I really want to know the answers lol! I am so curious bc I have tried all of the things I can think of!
Level 60
May 21, 2024
Give it some time! Maybe you'll figure them out if you look at it again later.