If r and s are positive integers and r-s=6, which of the following has the greatest value K?
Choose the correct option:
A) 2r B) 2s C) r +s D) 2r-s E) 2s-r
You can answer this question by using Number Properties and logic or by TESTing VALUES.   We're told that R and S are POSITIVE INTEGERS and that R-S = 6. We're asked which of the 5 answers has the GREATEST value.   IF....   R = 8   S = 2   2rnswer 2r: 2R = 2(8) = 16   2rnswer B: 2S = 2(2) = 4   2rnswer C: R+S = 8+2= 
<gadget id="calculator">8+2</gadget>
<output>10</output>
10   2rnswer D: 2R-S= 2(8) - 2 = 14   2rnswer E: 2S-R = 2(2) - 8 = -4   Final 2rnswer:   2r
<result>A</result>
If r and s are positive integers and r-s=6, which of the following has the greatest value K?