<PRE><B>Question 910235</B>
Let x be the first number
    x+2 be the second
    x+4 be the third
    x+6 be the fourth

(x)+(x+2)+(x+4)+(x+6) = 56  combine similar terms
x+x+x+x = 56-2-4-6
4x = 44     divide both side by 4 to get x
x= 11

x+2=?
11+2= 13

x+4=?
11+4= 15

x+6=?
11+6=17

CHECKING
11+13+15+17= 56
56 = 56</PRE>