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

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

Asked by Neha on 24 Jan 2023


Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

Asked by Neha on 26 Oct 2025

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

Asked by Neha on 26 Sep 2021


what does the below rebus mean?

Puzzle Understanding

Asked by Neha on 24 Jan 2026

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

Asked by Neha on 11 Sep 2025

Women do it once a year after they turn 19 but men get to do it only once in a lifetime. What is it?

Asked by Neha on 30 Apr 2026


Kareena is older than Katrina and younger than Karishma. Isabelle is younger than Bipasha and Karishma. Bipasha is older than Karishma. If Kareena and Isabelle are the same age, who's the youngest?

Asked by Neha on 31 Mar 2025

What do you answer even though it never asks you questions?

Asked by Neha on 12 Oct 2021

In the given picture, in how many ways can you read the word "Tiger"?

Read Word Tiger

Asked by Neha on 21 May 2023


Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

Asked by Neha on 18 Jul 2021

Hot Articles

Amazing Facts

Crossword

The day before the 1996 U.S. presidential election, the NYT Crossword contained the clue “Lead story in tomorrow’s newspaper,” the puzzle was built so that both electoral outcomes were correct answers, requiring 7 other clues to have dual responses.