some 6th std students each bought a pencil paying a total of 143rs.some of the 26 fifth std students each bought a pencil and they paid a total of 165rs.how many more fifth std students than sixth std students bought a pencil	Options.
A) 1	B) 2	C) 3	D) 4	E) 5
common factor between 165 and 143 is 11. (11*15=165, 11*13=143). so each pencil costs 11rs. and there was (13-11)= 
<gadget id="calculator">(13-11)</gadget>
<output>2</output>
2 students more in fifth std than sith std   ANSWER:2
<result>B</result>
some 6th std students each bought a pencil paying a total of 143rs.some of the 26 fifth std students each bought a pencil and they paid a total of 165rs.how many more fifth std students than sixth std students bought a pencil