Question 87
Find the least positive integer $n$ such that:
a. both $n$ and $n+1$ are divisible by the squares of two distinct prime numbers;
b. both $n$ and $n+3$ are divisible by the squares of two distinct prime numbers.
a. both $n$ and $n+1$ are divisible by the squares of two distinct prime numbers;
b. both $n$ and $n+3$ are divisible by the squares of two distinct prime numbers.