Difference between revisions of "1986 AJHSME Problems/Problem 4"
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| + | edit: the answer is C. The reason for this is that 1.8 and 2 are close, but when multiplied by 40, it's a big difference (80 and 72). So you could just do 1.8(40.37) which is basically 1.8*40=72. 74 is the closest to 72. | ||
==See Also== | ==See Also== | ||
Revision as of 10:14, 23 May 2010
Problem
The product 
is closest to
Solution
The easiest way to do this problem is to estimate, since it says "closest to", and the multiple choices are pretty spread out.
is about 
, 
is about 
, and 
is about 
.
Putting this in, we get 
is about 
edit: the answer is C. The reason for this is that 1.8 and 2 are close, but when multiplied by 40, it's a big difference (80 and 72). So you could just do 1.8(40.37) which is basically 1.8*40=72. 74 is the closest to 72.
See Also
| 1986 AJHSME (Problems • Answer Key • Resources) | ||
| Preceded by Problem 3 |
Followed by Problem 5 | |
| 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 | ||
