Problem:
What number is directly above in this array of numbers?
Answer Choices:
A.
B.
C.
D.
E.
Solution:
After completing some more rows, the pattern of squares as the last entry in each row becomes apparent. Thus, the line containing ends in , and the line above it ends in . Therefore is directly above , and is above .
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Answer: .
The problems on this page are the property of the MAA's American Mathematics Competitions