In a series of six consecutive even numbers, the sum of the second and sixth numbers is 24. What is the fourth number?

2 Answers on this Question

1. 12
   The series would be 6,8,10,12,14,16…

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2. 2a; 2a+2; 2a+4; 2a+6; 2a+8; 2a+10

   t_2 + t_6 = 24 => 2a+2 + 2a + 10 = 24 => a = 3

   therefore t_4 = 2(3) + 6 = 12

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