In a series of six consecutive even numbers, the sum of the second and sixth numbers is 24. What is the fourth number?
Q1. In a series of six consecutive even numbers, the sum of the second and sixth numbers is 24. What is the fourth number?
Answer: 12
Explanation: Let the series be n, n+2, n+4, n+6, n+8, n+10; the 2nd and 6th terms sum to 2n+12 = 24, giving n = 6, so the 4th term = 12.