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

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

Find the smallest sentence with all the English alphabet.

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

Make a sentence consisting of three words that have the whole alphabet.

Wednesday, Steve and Pam go to a restaurant to eat lunch. After eating lunch, they pay the bill. But Steve and Pam do not pay the bill. So…who does?

What do you see in the given picture?

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

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