rrsnathan wrote:
Hi,
I am unable to understand this problem. Please someone help me in this Problem
If z is a three-digit positive integer, what is the value of the tens digit of z ?
(1) The tens digit of z - 91 is 3 --> ifz-91=13 0, thenz=22 1 but ifz-91=13 9, then z=23 . Two different answers, hence this statement is not sufficient.
(2) The units digit of z + 9 is 5 --> if z+9=115 then z=10 but if z+9=125 then z=11 . Two different answers, hence this statement is not sufficient.
Notice that this statement
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