M x N:13 x 14::F x R: ......
A7x19
B5x17
C14x15
D6x18
A7x19
B5x17
C14x15
D6x18
Related Questions:
Select the option that is related to the third number in the same way as the second number is related to the first number and the sixth number is related to the fifth number.
168 : 8 :: 84 : ? :: 105 : 5