Difference between revisions of "1995 AHSME Problems/Problem 15"

(New page: ==Problem== Five points on a circle are numbered 1,2,3,4, and 5 in clockwise order. A bug jumps in a clockwise direction from one point to another around the circle; if it is on an odd-num...)
 
(See also)
Line 8: Line 8:
  
 
==See also==
 
==See also==
 +
{{AHSME box|year=1995|num-b=14|num-a=16}}
 +
 +
[[Category:Introductory Number Theory Problems]]

Revision as of 10:57, 29 September 2008

Problem

Five points on a circle are numbered 1,2,3,4, and 5 in clockwise order. A bug jumps in a clockwise direction from one point to another around the circle; if it is on an odd-numbered point, it moves one point, and if it is on an even-numbered point, it moves two points. If the bug begins on point 5, after 1995 jumps it will be on point

$\mathrm{(A) \ 1 } \qquad \mathrm{(B) \ 2 } \qquad \mathrm{(C) \ 3 } \qquad \mathrm{(D) \ 4 } \qquad \mathrm{(E) \ 5 }$

Solution

It moves 1, 2, 4, 1, 2, 4, etc. Thus after 1995=3*665 jumps, it will be on point 4 $\Rightarrow \mathrm{(D)}$.

See also

1995 AHSME (ProblemsAnswer KeyResources)
Preceded by
Problem 14
Followed by
Problem 16
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 26 27 28 29 30
All AHSME Problems and Solutions