The numbers 1 through 9 are arranged in a 3 x 3 grid so that each number is in the grid exactly once. They are arranged such that the top row plus the middle row gives the bottom row. If the grid forms another such addition when it is rotated 90 degrees to the left, what is its composition?

(Note: The numbers don't flip, for example 6 doesn't turn into 9.)

The sum of numbers from 1 to 9 is 45.
these nos are divided into a(first row) b (second row )and c (third row).
now we know that
a+b+c = 45.

but given a+b = c. which means 2c = 45 which is impossible..got it........

Posted by naiem on 2004-08-04 02:45:00