If an integer x is to be selected at random from 1 to 200, inclusive, what is probability x(x+1) will be divisible by 4?
Pick:  A) 0.5  B) 1  C) 0.25  D) 0.75  E) 1.25
because x(x+1) is always an even product of even*odd or odd*even factors,   there is a probability of 1 that that it will be divisible by 2,   and, thus, a probability of 1/2 that it will be divisible by 4   1*1/2=1/2= 
<gadget id="calculator">1/2</gadget>
<output>1/2 = around 0.5</output>
0.5   0.5nswer : 0.5
<result>A</result>
If an integer x is to be selected at random from 1 to 200, inclusive, what is probability x(x+1) will be divisible by 4?