If AB × 4 = 192, then A + B = 7.

False(F)

Here we have,

So,B×4 is a two digit number whose units digit is 2.

Therefore, the value of B is either 3 or 8.

But if B = 3,B×4 = 12 and A×4 + 1 ≠19,for any value of A between 0 to 9.

Therefore,B should be equal to 8,then B×4 = 32,

A × 4 + 3 = 19(when we multiply AB by 4, refer the above multiplication)

Hence,A×4 = 19-3 = 16

⇒ A = 4

Therefore,A = 4 ,B = 8,and A + B = 4 + 8 = 12