what is the ten digit of the positive integer r?
1. the tens digit of r/10 is 3
2. the hundreds digit of 10r is 6
b
1. the tens digit of r/10 is 3
2. the hundreds digit of 10r is 6
b
Let us understand this:Viper83 wrote:what is the ten digit of the positive integer r?
1. the tens digit of r/10 is 3
2. the hundreds digit of 10r is 6
b
xyz.ab be the format of a decimal,
where x = hundreds place
y = tens place
z = unit place
a = tenth place
b = hundredth place
Objective: ten digit of the positive integer r, means, the digit in the place of y?
1: the tens digit of r/10 is 3
y position of r/10 is 3 then we cannot say the y position of r but the x position of r.
Thus the hundreds position of r = 3 but no idea about tens position.
Not Sufficient.
2: the hundreds digit of 10r is 6
divide 10r by 10 we can get the corresponding hundreds/10 = tens place
r = 6
Sufficient
IMO B
