Whats the tens digit of the positive integer r?
1. The tens digit of r/10 is 3
2. The hundreds digits of 10r is 6
1. The tens digit of r/10 is 3
2. The hundreds digits of 10r is 6
Let us assume that r = xyz, where tens digit = y.teejaycrown wrote:Whats the tens digit of the positive integer r?
1. The tens digit of r/10 is 3
2. The hundreds digits of 10r is 6
We have to find the value of y.
(1) The tens digit of r/10 is 3.
r/10 = xy.z, which implies that tens digit is x. So, x = 3, but we cannot find y from here; NOT Sufficient.
(2) The hundreds digits of 10r is 6.
10r = xyz0, which implies hundreds digit is y here.
So, y = 6; SUFFICIENT.
The correct answer is B.
