Numbers 1, 2, 3, ..., 49 are written in the cells of 49×49 square, and the following holds: In every pair of cells that are symmetrical with respect to the main diagonal the same numbers are written;
In any row and in any column all the numbers are distinct.
What is the sum of all the numbers on this diagonal?

constants mean the stopped points or the points on a graph that nothing is changing, hope this

step-by-step explanation:

it has to have an angle of 90 degrees

step-by-step explanation:

why? because i noticed a pattern. 60 120. those numbers without the zero, make the 6 times tables leaving your answer to be b since 6 times 4 is 24 and adding a zero making it 240.