Question 78
List in increasing order the multiples of $3$ whose sum with $1$ is a perfect square:
$$3,15,24,48,\ldots$$
a) What number comes next after $48$?
b) What is the eighth number?
c) What number is in position $2013$?
$$3,15,24,48,\ldots$$
a) What number comes next after $48$?
b) What is the eighth number?
c) What number is in position $2013$?