ritula wrote:

If\((243)^x(463)^y = n\), where x and y are positive integers, what is the units digit of n?

(1) \(x + y = 7\)

(2) \(x = 4\)

A

3 ^1 = 3

3 ^2 = 9

3 ^3 = 27

3 ^4 = 81

Since last digit of both the numbers is 3.

and X+Y = 7 the unit digit will always be 7. (since 7-4 = 3)

Stmt 2: the unit digit depends on value of Y

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