HUGE

Problem of the Week - June 24, 2019


HUGE Image

Part 1 is to determine the sum of all the digits needed to write each counting number from 0 through 1,000,000,000,000.  For example, the sum of all the digits needed to write each counting number from 18 through 23 would be 1+8+1+9+2+0+2+1+2+2+2+3=33. 

Part 2 is to find the sum of the digits of the sum found in part 1.  In other words, for 18 through 23, the sum of all of the digits was 33, and the sum of the digits of that sum is 3 + 3 = 6. 

Finally, only submit your sum of the digits for the sum of the digits or simply the answer you determined for part 2.

Simply submit your answer to part 2.

Submit answer

Immediately after your correct answer is submitted, your name will be posted here.

Past problems
Individual Monthly & Annual Rankings
Leaderboard Monthly & Annual Rankings

Custom Leaderboards Are Here!

Take the competition to the next level and encourage participation by creating custom leaderboards for your students or friends to join. Click below to try it out now!

Get Started with Custom Leaderboards

Need Scratch Paper?

We encourage you to use Casio's new free online math software, ClassPad.net, as your digital scratch paper while solving the problems on our site!

Use ClassPad for digital scratch paper to solve this problem!