What goes up but never comes down?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

What time is it when an elephant sits on a fence?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?