Question

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Find the value of A and B :
B A
× B 3
5 7 A
(a) A = 5, B = 2 (b) A = 3, B = 6
(C) A = 4, B = 6 (d) A = 6, B = 7​

Answer 1

Answer:

a or  b

Step-by-step explanation:

Answer 2

Answer:

Option (a) A = 5, B = 2.

Step-by-step explanation:

According to the Problem:

The digit of the Product 3A is equal to A

We can do trial and error for A = 1 to 9, and find that this only happens when A = 5.

Now the Product (10B + 5)(10B + 3) is 575.  That is, $100B^2 + 80B = 560$

This cannot hold for values of B greater than 2, for example if B=3, the Left Hand Side crosses 900.

We can do trial and error for B = 1 to 2, and find that this equation only holds when B = 2.