A book has 300 pages. How many times is the digit '3' printed when numbering all the pages?
60
Count '3' in units place (30 times: 3, 13... 293), tens place (30 times: 30-39, 130-139, 230-239), and hundreds place (0 times, as max is 300). 30 + 30 = 60.
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Hard. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
More math riddles
What positive whole number has the exact same value when you multiply its digits together as when you add its digits together?
I am a prime number. If you reverse my digits, I become a different prime number, and the absolute difference between us is 18. What number am I?
One bunny costs 3 dollars. How many dollars do 3 bunnies cost?
Ava counts clocks in a pattern: 1, 3, 5, 7. How many clocks come next?
You have 10 bags of gold coins. 9 bags hold 10g coins, but 1 bag holds fake 9g coins. Using a digital scale only once, how can you find the fake bag?
Spelled out in English words, which positive integer has all of its letters arranged in strict alphabetical order?

