Difference between revisions of "2007 AMC 8 Problems/Problem 19"
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<math> 2x+1=131 </math> refutes the fact that <math> 2x+1<100 </math>, so the answer is <math> \boxed{\mathrm{(C)} 79} </math> | <math> 2x+1=131 </math> refutes the fact that <math> 2x+1<100 </math>, so the answer is <math> \boxed{\mathrm{(C)} 79} </math> | ||
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| + | ==See Also== | ||
| + | {{AMC8 box|year=2007|num-b=18|num-a=20}} | ||
Revision as of 22:48, 12 November 2012
Problem
Pick two consecutive positive integers whose sum is less than 
. Square both
of those integers and then find the difference of the squares. Which of the
following could be the difference?
Solution
Let the smaller of the two numbers be 
. Then, the problem states that 
. 
. 
is obviously odd, so only answer choices C and E need to be considered.
refutes the fact that , so the answer is 
See Also
| 2007 AMC 8 (Problems • Answer Key • Resources) | ||
| Preceded by Problem 18 |
Followed by Problem 20 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
| All AJHSME/AMC 8 Problems and Solutions | ||
