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AMC 8
1987 AMC 8
20
20
Part of
1987 AMC 8
Problems
(1)
1987 AJHSME Problem 20
Source:
6/25/2011
"If a whole number
n
n
n
is not prime, then the whole number
n
−
2
n-2
n
−
2
is not prime." A value of
n
n
n
which shows this statement to be false is
(A)
9
(B)
12
(C)
13
(D)
16
(E)
23
\text{(A)}\ 9 \qquad \text{(B)}\ 12 \qquad \text{(C)}\ 13 \qquad \text{(D)}\ 16 \qquad \text{(E)}\ 23
(A)
9
(B)
12
(C)
13
(D)
16
(E)
23