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

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

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?

A sundial has the fewest moving parts of any timepiece. Which has the most?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

I am working in a bus company. The company recently went under expansion and therefore there was not enough room for all the buses. As a result, twelve buses had to be stored outside.

If the company decides to expand the garage space by forty percent, enough space to accommodate the current buses will be created leaving enough space for twelve more buses if the need arises in future.

Can you calculate the number of buses that the company owns at present?

Can you count the number of quadrilaterals in the picture below?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?

There is one four-digit whole number n, such that the last four digits of n2 are the original number n