Book Numbering Riddle
988.7K Views
I am compiling the Puzzlefry world almanac and it now contains lots of pages.
I know that it takes 121 digits to print the page numbers in sequence.
How many numbered pages does the book have and how many times does the number 9 appear?
You require 11 digits to print first 10 pages. (1 – 9, 1 and 0 for 10) Thereafter, every page require 2 digits. Since the total number of digits used is 121, there are 110 digits remaining, which can print 55 pages of two-digit numbers. Hence, total number of pages = 65.
The digit ‘9’ will appear on pages 9, 19, 29, 39, 49 and 59 – That’s a total of 6 times.
Your Answer
More puzzles to try-
Biggest number using four 3s Puzzle
What should be the biggest number being formed using Four 3s according to you? Think Big! Bigger! and the Biggest!!!!Read More »Doctor without Doctor
There was a minor accident with a doctor’s son but the doctor noticed no major injury. After the treatment, the ...Read More »1000 coins and 10 bags
A dealer has 1000 coins and 10 bags. He has to divide the coins over the ten bags so that ...Read More »Numbers as Game
Find The Missing Number In the Sequence. 6 25 64 ? 32 1Read More »Guess The 5 Digit Number
I know a 5-digit number having a property that With a 1 after it, it is three times as large ...Read More »Lift an elephant with one hand
How can you lift an elephant with one hand?Read More »Five greedy pirates and gold coin distribution Puzzle
Five puzzleFry ship’s pirates have obtained 100 gold coins and have to divide up the loot. The pirates are all ...Read More »Shootout in Toilet
John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the ...Read More »Dorry The Dragon and the Ball
Dorry the Dragon just can’t help himself….he loves beach balls! Unfortunately, beach balls don’t like him much – they tend to ...Read More »Cubicle painting
An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles ...Read More »who has doesn’t keep
The one who has it does not keep it. It is large and small. It is any shape.Read More »Umbrella in Rainy Season
In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella. The umbrella is not huge enough ...Read More »You are in space riddle
Imagine you are in space. How do you get down on the Earth?Read More »What do these things all have in common
What do these things all have in common: Laughter, living well, and a good offense?Read More »Can be used to stop riddle
It can be used to stop, It take one to smoke; Not only does it stop, But it is a ...Read More »Bank robbery and wise teller puzzle
A bank is getting robbed, Robbers enters the bank and make sure of securing all emergency buttons and one of ...Read More »Determining the number of one hat
N people team up and decide on a strategy for playing this game. Then they walk into a room. On ...Read More »Father & Son riddle
Two fathers and two sons sat down to take tea. They had exactly three cup of tea, each person had ...Read More »Do you Like It?
No one wants to have it, but if one got it, he does not want to lose it. What is ...Read More »What does it mean?
What does it mean?Read More »
Accenture Interview PuzzlesAdobe Interview PuzzlesAge RiddleAkbar Birbal PuzzlesAlgorithm PuzzlesAlphabet riddleAmazon Interview PuzzlesAnalytical MathematicsAptitude PuzzleBank PuzzlesBetting PuzzlesBrain TeasersCalendar PuzzlesCards PuzzlesChess Board PuzzleChess PuzzlesChristmas Puzzlecipher PuzzleCivil Services PuzzleClock time puzzleCognizant Interview PuzzlesCoins PuzzleComputational PuzzleconundrumCoronavirus PuzzleCoupondunia Interview PuzzleCritical Thinking Puzzledata analyticsData Structure Interview QuestionsDecode PuzzleDetective PuzzlesDice PuzzleDictionary Riddlesdifficult riddleEasy Math puzzlesEasy puzzlesEinstein puzzleEnglish RiddleFamily Tree Puzzlefamous puzzleFill in the blanks riddlesFinding Killer RiddlesFlipkart interview puzzlesFunny RiddlesGeneral KnowledgeGeographical PuzzleGoogle Code Jam 2014Google Interview PuzzlesGRE PuzzleHard Puzzle