How many three digit numbers E are divisible by 78 or 91?	Choose the correct choice.
A) 17 B) 19 C) 20 D) 21 E) 22
The answer will be 19.   Explanation:   78= 2*3*13 now multiples of 78, 156 ....780, now   1000-780= 
<gadget id="calculator">  1000-780</gadget>
<output>220</output>
220 only two more muktiples of 78 can exists. So total number of 3 digit Multiples of 78 are   9+2= 
<gadget id="calculator">  9+2</gadget>
<output>11</output>
11   91= 13*7--Total number of three digit multiples --9   No remember we have a common multiples as well-- 13*7*6=91*6= 
<gadget id="calculator">91*6</gadget>
<output>546</output>
546   So total number of multiples E--11+9 -1= 
<gadget id="calculator">--11+9 -1</gadget>
<output>19</output>
19.   Hence Answer is 19.19
<result>B</result>
How many three digit numbers E are divisible by 78 or 91?