<p>Could you help me solve these two problems?</p>
<p>1) If j, k, and n are consecutive integers such that 0< j< k< n and the units(ones) digit of the product jn is 9, what is the units digit of k?</p>
<p>(A) 0
(B) 1
(C) 2
(D) 3
(E) 4</p>
<p>2) Let @x be defined as x+ (1/x) for all nonzero integers x. If @x = t, where t is an integer, which of the following is possible value of t?</p>
<p>A) 1
B) 0
C) -1
D) -2
E) -3</p>
<p>Thanks.</p>