top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

Great Ramanujam found 1729 as a magic number, what was the magic about it?

+1 vote
482 views

1729 is also known as hardy-ramanujan number. While they were going in a taxi, Mr. Hardy told Ramnujan that what a boring number is this(referring to the taxi number 1729) then Ramanujan told him how interesting is this number!

Now the question is what was so interesting in it.

posted Mar 29, 2015 by anonymous

Share this puzzle
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

It is the smallest number expressible as the sum of two cubes in two different ways.
The two different ways are:
1729 = 13 + 123 = 93 + 103

answer Aug 2, 2018 by Hanifa Mammadov



Similar Puzzles
0 votes

Alzim and Era each select a whole number greater than zero and play a game.

Mufti, the host of a part of logicians, says, “Each of you has picked a whole number greater than zero and secretly reported the number to me. I have written the sum of the numbers on one card, and the product on another card. I have randomly hidden one card and will reveal the other.”

Mufti reveals a card showing the number 2020, and asks, “Do you know the other person’s number?” Alzim and Era are asked this in turn.

Alzim replies, “No, I do not know Era’s number.”

Era says, “No, I do not know Alzim’s number.”

Then Alzim replies, “Yes! I know Era’s number!”

So what was Era’s number? And what can you conclude about Alzim’s number?

0 votes

Given the numbers between 1 and 1 million, what is so special about the number 40 that it makes the number stand out of the crowd?

+1 vote

Fill a 5*5 matrix with elements 1 to 25 so that the sum of each row, sum of each column, and sum of diagonal elements gives same result.

...