A, b and c are 3 digit positive integers, where a=b+c. Is the hundreds digit of A equal to the sum of the hundreds digit of b and the hundredes digit of c?
(1) the tens digit of A is equal to the sum of the tens digit of b and the tens digit of c
(2) the units digit of a is equal to the sum of the units digit of b and the units digit of c.
For (1), b=542, c=351, so a= 893
but then the tens digits of b and c can both be 5 so a can't be a 3 digit ineger
(2) is insufficient==> b=545, c=455, so then a would be 1000
but why is the answer A??
(1) the tens digit of A is equal to the sum of the tens digit of b and the tens digit of c
(2) the units digit of a is equal to the sum of the units digit of b and the units digit of c.
For (1), b=542, c=351, so a= 893
but then the tens digits of b and c can both be 5 so a can't be a 3 digit ineger
(2) is insufficient==> b=545, c=455, so then a would be 1000
but why is the answer A??
