1. The pages of a report are numbered consecutively from 1 to 10. If the sum of the page numbers up to and including page number x of the report is equal to one more than the sum of the page numbers following page number x, then x =
A) 4 B) 5 C) 6 D) 7 E) 8
Answer: D
2) If n and p are different positive prime numbers, which of the integers n^4, P^3, and np has (have) exactly 4 positive divisors?
A) n^4 only
B) p^3 only
C) np only
D) n^4 and np
E) p^3 and np
