We can solve this question with an equation. Knowing that the numbers in the sequence are EVEN, we know that they are two apart. So...
x + (x+2) + (x + 4) + (x + 6) + (x + 8) = 310
Combine like terms and you'll get this:
5x + 20 = 310
Using subtraction of equality:
5x = 290
Using division of equality:
x = 58
NOW, the question isn't asking for the value of x but the value of the 3rd number in the sequence. Go back to the original equation and plug in x to the 3rd number.
the 3rd number = x + 4 = 58 + 4 = 62
Voila! Hope this helps!
