Unlisted Phone Number

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?




Similar Riddles

Using eight eights and addition only, can you make 1000?

Asked by Neha on 17 Feb 2024


Which is faster, Heat or Cold ? Explain.

Heat or Cold ?

Asked by Neha on 23 Mar 2021

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Asked by Neha on 27 Oct 2021


My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Asked by Neha on 10 Sep 2025

Keyboard words are not in alphabetical order, Why?

Asked by Neha on 26 Jul 2023

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Asked by Neha on 01 Jan 2021


While sitting in the Car, John suddenly finds that one of the wheels was missing. John noticed that a killer is approaching towards him. John cannot get out of the car.

How will John escape?

Asked by Neha on 14 Jan 2021

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

Asked by Neha on 20 Apr 2025

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

Count the Triangle

Asked by Neha on 11 Apr 2024


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

Asked by Neha on 29 Mar 2024

Hot Articles

Amazing Facts

Gambling

In Canada, a mathematical puzzle must be solved in order to win the lottery to classify it as a “game of skill” not gambling.