singhprince11 wrote:
In Question no. 11 of Diagnostic test, Statement 2 is " @ is divisible by 9" since statement 1 says " @! is not divisible by 5" which means @<5. The two statements are contradicting each other when we consider @= 0 or 9. Actually it should be only @=0. Since in GMAT, the two options cannot contradict each other. Hence the answer B. Please correct me if I am wrong.
Welcome to GMAT Club. The question you are talking about is discussed here:
gmat-diagnostic-test-question-79339.html and there is no contraction between the statements. From (1) possible values of @ are as 0, 1, 2, 3, 4 and from (2) possible values of @ are 0 and 9 (here, saying that 9 is not a possible value because first statement doesn't allow this would be wrong, since you cannot use info from one statement when considering another).
Complete solution:
1233@ to be divisible by 5 symbol @ should represent either 0 or 5. So the question asks whether @ equals to 0 or 5.(1) @! is not divisible by 5 --> @ can be 0, 1, 2, 3, or 4 (note that 0!=1). Not sufficient.
(2) @ is divisible by 9 --> @ can be 0 or 9 (note that zero is divisible by every integer except zero itself). Not sufficient.
(1)+(2) Intersection of the values for @ from (1) and (2) is @=0. Sufficient.
Answer: C.
In case of any question please post it here:
gmat-diagnostic-test-question-79339.html Hope it helps.