If x, y, and z are positive integers and 3x = 2y = 4z, then the least possible value of x + y + z is	Select
A) 15
B) 25
C) 30
D) 42
E) 13
given 3x=2y=4z   x+y+z in terms of x   = x+(3x/2)+(3x/4) = 26x/8=13x/4   now checking with each of the answers and see which value gives a minimum integer value.   A x = 4/13*15 , not an integer   B,C,E can be ruled out similarly.   D is minimum value as x = 13*4/13= 
<gadget id="calculator">13*4/13</gadget>
<output>4</output>
4   Answer is 13
<result>E</result>
If x, y, and z are positive integers and 3x = 2y = 4z, then the least possible value of x + y + z is