The centre of the third figure is empty. What digit should fit inside?

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

Sally lives in a place where six months of the year is mild summer and the temperature drops significantly the other six months. She owns a lake where there is a small island. She wants to build a house on the island and needs to get materials there. She doesn’t have a boat, plane, or anything to transport them to the island. How does Sally solve this problem?

Why 1729 is a magic number? Answer Logically.

Can you solve the below rebus?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

What is more useful when it is broken?

If,

A = 1

B = 2

C = 3

...

...

Z = 26.

Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.