Three numbers are in the ratio 3 : 4 : 8. The sum of its longest and smallest numbers equals the sum of the third number and 42. Find the third number?  Choose the correct choice
A) A)54 B) B)75 C) C)24 D) D)46 E) E)63
Let the numbers be 3x, 4x, 8x.   Largest number = 8x.   Smallest number = 3x.   Third number = 4x.   8x + 3x = 4x + 42   7x = 42 =&gt;x=6   4x=24 =&gt;third number is 24.   Answer:24
<result>C</result>
Three numbers are in the ratio 3 : 4 : 8. The sum of its longest and smallest numbers equals the sum of the third number and 42. Find the third number?