1. The Fibonacci sequence is given by 1, 1, 2, 3, 5, 8, 13, 21, . . . Which one of the ten digits is the last to appear in the unit’s position of a number in the Fibonacci sequence?
(A) 0
(B) 4
(C) 6
(D) 7
(E) 9
2. Two different prime numbers between 4 and 18 are chosen. When their sum is subtracted from their product, which of the following numbers could be obtained?
(A) 21
(B) 60
(C) 119
(D) 180
(E) 231
3. The sides of a triangle with positive area have lengths 4, 6 and x. The sides of a second triangle with positive area have lengths 4, 6 and y. What is the smallest positive number that is not a possible value of |x − y|?
(A) 2
(B) 4
(C) 6
(D) 8
(E) 10
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