**9-digit Number**- Back to the Number Puzzles

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

**This old topic is locked since it was answered many times. You can check solution in the Spoiler below.**

Pls visit New Puzzles section to see always fresh brain teasers.

Pls visit New Puzzles section to see always fresh brain teasers.