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test
This question is asking about the top-surface area of an aquarium. Instead of giving us the actual surface area, the question stem provides the surface area per fish: 36. The surface area per fish would be equal to the surface area divided by the number of fish: $$surface\ area\ per\ fish\ =\ \frac{...
- by aockert
Fri Jan 05, 2018 3:11 pm- Forum: Data Sufficiency
- Topic: A rectangular aquarium provides 36 square centimeters
- Replies: 1
- Views: 794
The question here tells you that n is one of the 7 numbers listed. Statement 1 says that n is a multiple of 3. This means that n is equal to 3x1, 3x2, 3x3...etc. To match this rule up with the set in the question, simply check to see which of those 7 numbers are divisible by 3. 15 and 30 are the onl...
- by aockert
Tue Dec 05, 2017 4:06 pm- Forum: Data Sufficiency
- Topic: If n is a member of the set {10, 15, 20, 25, 30, 35, 40}
- Replies: 1
- Views: 677
A quick way to approach this question is to plug in your own numbers. When looking at these two statements, Statement 2 is more definite, (the average of two variables equals a constant rather than another variable) so start with that Statement. The average of b and c is 4. Substitute 5 and 3 for b ...
- by aockert
Tue Dec 05, 2017 3:54 pm- Forum: Data Sufficiency
- Topic: What is the average of a, b and c?
- Replies: 2
- Views: 2484
TTT
Taken one step further, this question is asking if x^2 > 25. You can simplify this by solving the inequality x>5 or x<-5. This is the same as |x|>5. Now look at the two statements. You would definitely want to focus on Statement (2) since it is much easier to deal with. We already found that for x^2...
- by aockert
Tue Dec 05, 2017 3:29 pm- Forum: Data Sufficiency
- Topic: Is x^2 > 5^2 ?
- Replies: 2
- Views: 882
TTT
The trick to this question is to remember that to calculate an average, you add up all the values and then divide by how many values there are. This is difficult to see with values that are given as variables rather than actual numbers. If you look at Statement (1), you are given THREE values: x, y,...
- by aockert
Thu Nov 30, 2017 1:48 pm- Forum: Data Sufficiency
- Topic: If x is an integer, is y an integer?
- Replies: 1
- Views: 976