GMAT Book 1 - Ch.6 FDP Strategies
T or F - The key to Data Sufficiency is to remember that it does not require you to answer the question asked in the question stem. Instead, you need to decide whether the statements provide enough information to answer the question.
True
T or F: If a Data Sufficiency question asks for the concrete value of one element of a ratio, you will need BOTH the concrete value of another element of the ratio AND the relative value of two elements of the ratio.
True
T or F: If a Data Sufficiency question asks for the relative value of two pieces of a ratio, ANY statement that gives the relative value of ANY two pieces of the ratio will be sufficient.
True
T or F: You should try to make your rounding errors cancel by rounding some numbers up and other downs
True
T or F: you need more information to find a concrete value
True
T or F: you will pick a smart number when no amounts are given in the problem; but will not pick smart numbers when any amount or total is given
True
Karen bought a new television, originally priced at $690. However, she had a coupon that saved her $67. For what percent discount was Karen's coupon?
You know that 10% of 690 would be 69. Therefore, 67 is slightly less than 10% of 690.
what should you do with problems with unspecified amounts?
pick 100
benchmark value 1/10
.10
benchmark value 1/5
0.20
benchmark value 1/4
0.25
Benchmark value 1/3
0.33
Benchmark value 1/2
0.50
Benchmark value 2/3
0.66
Benchmark value 3/4
0.75
Differentiate: -concrete values -relative values
1. Concrete values are actual amounts (# of tickets sold, liters of water, etc.), 2. relative values relate two quantities using fractions, decimals, percents, or ratios (twice as many, 60% less, ratio of 2:3, etc.). ex. relative value = relative = relative to another...
It rains all day every Saturday and Sunday in Seattle, and never on any other day. Is it raining in Seattle right now? (1) Today is not Monday or Tuesday. (2)Today is not Wednesday, Thursday, or Friday. (A) Statement (1) ALONE is sufficient, but statement (2) is NOT sufficient (B) Statement (2) ALONE is sufficient, but statement (1) is NOT sufficient (C) BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient (D) EACH statement ALONE is sufficient (E) Statements (1) and (2) TOGETHER are NOT sufficient
Answer: C
Jon's birthday party is this week. What day of the week is the party on? (1)The party is not on Monday or Tuesday. (2)The party is not on Wednesday, Thursday, or Friday. (A) Statement (1) ALONE is sufficient, but statement (2) is NOT sufficient (B) Statement (2) ALONE is sufficient, but statement (1) is NOT sufficient (C) BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient (D) EACH statement ALONE is sufficient (E) Statements (1) and (2) TOGETHER are NOT sufficient
Correct answer: E
What is 1,530,794 -s- (31.49 x 104) to the nearest whole number?
Heave Division Shortcut
Which is greater 127/255 or 162/320?
If you recognize that 127 is less than half of 255, and 162 is more than half of 320, you will save yourself a lot of cumbersome computation.
Define: -Smart numbers
NUMBERS equal to common multiples of the denominators of the fractions in the problem.
