Building Puzzle

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




Similar Riddles

I have thought of a number that is made up by using all the ten digits just once. Here are a few clues for you to guess my number:

First digits is divisible by 1.
First two digits are divisible by 2.
First three digits are divisible by 3.
First four digits are divisible by 4.
First five digits are divisible by 5.
First six digits are divisible by 6.
First seven digits are divisible by 7.
First eight digits are divisible by 8.
First nine digits are divisible by 9.
The number is divisible by 10.

Can you find out the number ?

Asked by Neha on 12 Mar 2023


What does this mathematical rebus means ?

Maths Riddle

Asked by Neha on 01 Apr 2021

Which part of London exists in France as well ?

Asked by Neha on 17 Feb 2021


A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

Asked by Neha on 06 Sep 2025

Can you divide the below-given shape into four equal and identical pieces?

Divide in Equal Shape

Asked by Neha on 27 Nov 2023

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

Asked by Neha on 27 May 2025


What number comes next in the series?

5 15 5 18 5 24 14 20 _

Asked by Neha on 15 Jun 2023

Akbar called Birbal and asked him to draw a line on the floor. He asked Birbal to make that line smaller without erasing it. Birbal smiled and did it before Akbar could blink his eyes.

How did he managed to do it?

Akbar Birbal line on the floor riddle

Asked by Neha on 07 May 2021

You need to arrange three 7 and mathematical symbols to form number 1?

Asked by Neha on 02 Jul 2021


During which month do people sleep the least?

Asked by Neha on 13 Apr 2022

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Amazing Facts

Challenging

There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.