Emes is hard to find
- Emes is the Yiddish word for truth.
- I didn’t know that.
- Truth is hard to find.
- That I knew!
- Did you know that the digit sum of 441 is 9?
- 4 + 4 + 1 = 9. So what?
- Did you know that no matter what you multiply 36 with the answer’s repeated digit sum is 9?
- Let me try. 36 x 17 = 612 and 6 + 1 + 2 = 9. It works!
- Could have been a lucky coincidence, try another one.
- 36 x 1952 = 70272 and 7 + 0 + 2 + 7 + 2 = 18. It failed!
- 1 + 8 = 9. It worked!
- Is that what you meant when you said ‘repeated’ digit sum?
- I guess so.
- Let me try a last example. 36 x 9853 = 354708. 3 + 5 + 4 + 7 + 0 + 8 is 27 and 2+ 7 = 9. It always works!
- Can you prove it?
- I just did. I tried three numbers and they all worked.
- I see.
- I didn’t know I had it in me to be a mathematician.
- Neither did I.
- I feel great!
- By the way, did you know that 9 is the mispar katan of truth?
- Mispar who?