Why do you find that most of the buildings are deprived of the 13th floor?

How many times can you subtract the number 5 from 25?

What Does this text mean:

important=important

Forwards I am heavy, backward I am not. What am I?

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

Solve below rebus puzzle?

If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?

What has one letter and starts with an E?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

2, 3, 5, 9, 17, _ What is the next number in the sequence?