Place each digit from 1 through 9 in the empty squares of the grid so that the three rows across and the three rows down form correct arithmetic statements.

         

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Solution to the Problem:


         

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Here is eleven year old Tristan Sparkes' solution and how he solved the problem:          



Correctly solved by:

1. K. Sengupta Calcutta, India
2. Colin (Yowie) Bowey Beechworth, Victoria, Australia
3. Tristan Sparkes ----------
4. Bruce Sparkes ----------
5. Davit Banana Istanbul, Turkey
6. Dr. Hari Kishan D.N. College,
Meerut, Uttar Pradesh, India
7. Jasmine Hernandez Central High School,
Grand Junction, Colorado
8. Ali Sibert Mountain View High School,
Mountain View, Wyoming
9. Ritwik Chaudhuri Santiniketan, West Bengal, India
10. Ivy Joseph Pune, Maharashtra, India
11. Rumen Videnov American College of Sofia,
Sofia, Bulgaria
12. Kelly Stubblefield Mobile, Alabama