Brain exercise: GMAT Club Forum • Laura sells encyclopaedias : GMAT Data Sufficiency (DS)

6 Oct

http://gmatclub.com/forum/laura-sells-encyclopaedias-and-her-monthly-income-has-two-64646.html

Laura sells encyclopaedias, and her monthly income has two components, a fixed component of $1000, and a variable component of $C for each set of encyclopaedias that she sells in that month over a sales target of n sets, where n>0. How much did she earn in March? 

(1) If Laura had sold three fewer sets in March, her income for that month would have been $600 lower than it was. 
(2) If Laura had sold 10 sets of encyclopaedias in March, her income for that month would have been over $4000.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. Both statements TOGETHER are sufficient, but NEITHER one ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

More:
http://gmatclub.com/forum/if-n-is-a-positive-three-digit-number-that-is-greater-than-164327.html

If N is a positive three-digit number that is greater than 200, and each digit of N is a factor of N itself, what is the value of N?

(1) The tens digit of N is 5.

(2) The units digit of N is 5.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. Both statements TOGETHER are sufficient, but NEITHER one ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

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