If u r genius solve it:-
50 * 15 = 12
40 * 14 = 11
30 * 13 = ?  Choose the correct choice:  A) 2  B) 12  C) 6  D) 8  E) 10
Logic :   50*15= 
<gadget id="calculator">50*15</gadget>
<output>750</output>
750=7+5+0= 
<gadget id="calculator">7+5+0</gadget>
<output>12</output>
12   40*14= 
<gadget id="calculator">40*14</gadget>
<output>560</output>
560=5+6+0= 
<gadget id="calculator">5+6+0</gadget>
<output>11</output>
11   So 30*13= 
<gadget id="calculator">30*13</gadget>
<output>390</output>
390=3+9+0= 
<gadget id="calculator">3+9+0</gadget>
<output>12</output>
12   Answer : 12
<result>B</result>
If u r genius solve it:-
50 * 15 = 12
40 * 14 = 11
30 * 13 = ?