1996 AIME Problems/Problem 2
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Problem
For each real number 
, let 
denote the greatest integer that does not exceed x. For how many positive integers 
is it true that 
and that 
is a positive even integer?
Solution
For integers 
, we want 
, or 
. Thus, must satisfy these inequalities (since 
):
There are 
for the first inequality, 
for the second, 
for the third, and 
for the fourth, so the answer is 
.
See also
| 1996 AIME (Problems • Resources) | ||
| Preceded by Problem 1 | Followed by Problem 3 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 | ||
