1) Laura is reading a book and notices that the page number she has reached is divisible by 3, 4, and 5. What is the units digit of the next page number? (A) 1, (B) $3, \quad$ (C) 5, (D) $6, \quad$ (E) 9.
1. The answer is $(\mathbf{A})$.

The page number Laura has reached, being divisible by 3, 4, and 5, must necessarily be divisible by their least common multiple, which is 60. All multiples of 60 end in zero, so the next page will have 1 as the units digit.