The sum of four consecutive multiples of 5 is 250. What is the largest of them?

Explanation

1. 01

   Let them be $a, a + 5, a + 10, a + 15$: $4a + 30 = 250$.

2. 02

   $a = 55$; the multiples are 55, 60, 65, 70.

3. 03

   The largest is 70.