January 2014
Problem of the Month

Cross Out
by Henry Hook
in GAMES April 2006



Cross out twelve of the 36 numbers in the grid below so that each row and each column is left with exactly four numbers that total 10.

  2     1     2     2     5     4  
  5     1     1     6     2     3  
  3     3     5     1     3     1  
  1     7     6     1     1     2  
  2     5     1     4     1     3  
  4     1     2     4     2     3  

You may send in your answer in this form:
Column 1: Cross out x and y.
Column 2: Cross out p and q.
Column 3: Cross out a and b.
Column 4: Cross out e and f.
Column 5: Cross out r and s.
Column 6: Cross out u and v.



Solution to the Problem:

The answer is:
Column 1: Cross out 3 and 4.
Column 2: Cross out 3 and 5.
Column 3: Cross out 6 and 1 beneath it.
Column 4: Cross out 2 and 6.
Column 5: Cross out 2 and 2.
Column 6: Cross out 4 and 2.

  2     1     2         5      
  5     1     1             3  
          5     1     3     1  
  1     7         1     1      
  2             4     1     3  
      1     2     4         3  




Correctly solved by:

1. James Alarie Flint, Michigan
2. Chase L. Smith Mountain View High School,
Mountain View, Wyoming
3. Isaac Kampman Mountain View High School,
Mountain View, Wyoming
4. Chad Fore Gate City, Virginia
5. Shaylynn Martin Mountain View High School,
Mountain View, Wyoming
6. Riley Dolezal Mountain View High School,
Mountain View, Wyoming
7. Chelsea Anglen Mountain View High School,
Mountain View, Wyoming
8. Cade Covington Mountain View High School,
Mountain View, Wyoming
9. Caleb Flake Mountain View High School,
Mountain View, Wyoming
10. Ethan Salsbury Mountain View High School,
Mountain View, Wyoming


Send any comments or questions to: David Pleacher