Question

Write the numbers1, 2, 3, 10, 11, 12, 19, 20 and 21 into the fields of a 3x3 grid so that the sum of the numbers in each row, column and diagonal is the same.


PLZ HELP DUE TOMORROW!

Answer 1

I need to know, which order to put those numbers on a 3x3 grid, so I get the same answer for each number! ( I'm confused too ) ( Canada, Toronto )

Answer 2

The sum of all the numbers is 99, so each row must sum to 33

10+11+12 = 33, so maybe that will form a diagonal. A little playing around, placing 19,20,21 in different rows and columns, gave me

19 3 11
2 10 21
12 20 1

Answer 3

Thanks for helping my son again, the teacher goes very strict on him :)