Roundoff Riddle

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.




Similar Riddles

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

Half Filled barrel

Asked by Neha on 10 May 2023


Can you identify if it's a murder or a suicide ?


Murder or Suicide?

Asked by Neha on 17 May 2021

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den

Asked by Neha on 11 Oct 2024


How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

Asked by Neha on 24 Apr 2021

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

Asked by Neha on 24 Feb 2022

I’m tall when I’m young, and I’m short when I’m old. What am I?

Asked by Neha on 07 May 2022


What Adam and Eve do not have but the rest of the people have?

Asked by Neha on 15 Mar 2023

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Asked by Neha on 17 Jan 2025

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Asked by Neha on 27 Feb 2024


We are a group of eight brothers. We consider the weak, yet we protect the king in every battle. If we move ahead, we never turn back. Who are we?

Asked by Neha on 15 Feb 2026

Hot Articles

Amazing Facts

Artificial Intelligence

Artificial Intelligence has crushed all human records in the puzzle game “2048,” achieving a high score of 839,732 and beating the game in only 973 moves without using any undo.