According to the answer key the ans. is B.

Not sure how to come to that.

Algebra Question

Marta bought several pencils. If each pencil was either a 23-cent pencil or a 21-cent pencil, how many 23-cent pencils did Marta buy?

(1) Marta bought a total of 6 pencils

(2) The total value of the pencils Marta bought was 130 cents

Thanks,

Coordinate Geometry question

Circle C and line k lie in the xy-plane. If circle C is centered at the origin and the radius 1, does line k intersect circle C?

(1) The x-intercept of the line k is greater than 1

(2) The slope of line k is -1/10

Thanks,

Ok, this is my fault but I should added the () - that's why I could not get the translation

The question is:

Is 1/(a-b) < b -a?

Sorry about that.

This might be a stupid question but can you illustrate how you re-translated the question stem?

Thanks,

Prime Nos.

If p is a prime number greater than 2, what is the value of p?

(1) There are a total of 100 prime numbers between 1 and p+1

(2) There are a total of p prime numbers between 1 and 3,912

Thanks

Sequence Problem

If each term in the sum A1 + A2 + ..... + An is either 7 or 77 and the sum equals 350, which of the following could be equal to n?

(1) 38
(2) 39
(3) 40
(4) 41
(5) 42

Thanks.

Question on Averages

On Jane's credit card account, the average daily balance for a 30-day billing cycle is the average (arithmetic mean) of the daily balances at the end of each of the 30 days. At the beginning of a certain 30-day billing cycle, Jane's credit card account had a balance of $600. Jane made a payment of $...