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

– by 0

A. 12
B. 18
C. 23
D. 45

Let the numbers be x, x + 2, x + 4, x + 6, x + 8 and x + 10.
Given (x + 2) + (x + 10) = 24
=> 2x + 12 = 24 => x = 6
The fourth number = x + 6 = 6 + 6 = 12.

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