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The best way to approach this problem is to test cases: How many perfect squares are less than the integer d? 1) 23 < d < 33 if d = 32, there are 5 perfect squares less than d: 1, 4, 9, 16, 25 if d = 24, there are 4 perfect squares less than d: 1, 4, 9, 16 Insufficient 2) 27 < d < 37 if d = 36, ther...
- by ceilidh.erickson
Thu May 16, 2019 10:46 am- Forum: Data Sufficiency
- Topic: How many perfect squares are less than the integer \(d\)?
- Replies: 1
- Views: 565
OP: there is an error in this question. Are you sure it's transcribed correctly? As written there is no correct answer. In any consecutive (or evenly spaced) set, the median is always equal to the average. If we want to change the average *without* changing the median, we must make it a non-evenly-s...
- by ceilidh.erickson
Thu May 16, 2019 10:23 am- Forum: Problem Solving
- Topic: In a set of five consecutive integers, which of the
- Replies: 2
- Views: 596
When we're asked to EVALUATE an argument, it's implied that there is currently missing information - UNSTATED ASSUMPTIONS - that would be needed for the argument to logically cohere. Premise: Freewheeler’s sales for May, June, July, and August totaled over 50,000. Conclusion: As a result, Fedora w...
- by ceilidh.erickson
Thu May 16, 2019 9:59 am- Forum: Critical Reasoning
- Topic: Fedora Convertibles began selling the Freewheeler - its
- Replies: 2
- Views: 641
This question is testing MODIFIERS. If we have an "and" linking two nouns (e.g. "Latimer and Edison") followed by a noun modifier (e.g. "who"), it's implied that both nouns are being modified. So in "... Lewis Latimer and Thomas Edison, who became known...", i...
- by ceilidh.erickson
Thu May 16, 2019 9:35 am- Forum: Sentence Correction
- Topic: The pioneering research of Lewis Latimer and Thomas Edison,
- Replies: 2
- Views: 838
For more on using this strategy for BOLDFACE questions on CR, see: https://www.beatthegmat.com/journalist-every-election-year-at-this-time-the-state-gover-t306075.html https://www.beatthegmat.com/most-of-western-music-since-the-renaissance-has-been-based-t305309.html#823603 https://www.beatthegmat.c...
- by ceilidh.erickson
Sat May 04, 2019 2:45 pm- Forum: Critical Reasoning
- Topic: Last year a record number of new manufacturing jobs were
- Replies: 2
- Views: 4467
The goal in any BOLDFACE question is to deconstruct the argument, and determine the role of each statement: - author's conclusion / position - reasoning that supports the author's position - the counterpoint / what others believe - support for the counterpoint - neutral / background information / es...
- by ceilidh.erickson
Sat May 04, 2019 2:44 pm- Forum: Critical Reasoning
- Topic: Last year a record number of new manufacturing jobs were
- Replies: 2
- Views: 4467
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This question is testing SUBJECT-VERB AGREEMENT, modifiers, & logical lists. In the dependent clause "... that food (high in whole grain fiber) creates...", the subject is the singular "food" and the verb is "creates." A. fiber creates the energy we need to fight il...
- by ceilidh.erickson
Sat May 04, 2019 2:24 pm- Forum: Sentence Correction
- Topic: Ramón pointed out that food high in whole-grain fiber creat
- Replies: 4
- Views: 1841
If we want the minimum amount of wrapping paper, we want to know the SURFACE AREA of all surface except the bottom surface. Calculate each:
Top surface area = 25 x 10 = 250
2 sides of 5 x 10 = 2(5*10) = 100
2 sides of 5 x 25 = 2(5*25) = 250
250 + 100 + 250 = 600
The answer is B.
- by ceilidh.erickson
Sat May 04, 2019 1:56 pm- Forum: Problem Solving
- Topic: The outside of the rectangular box represented in the figure
- Replies: 2
- Views: 567
If the scale is 1 in = 15 ft, then the dimensions of the floor = 15x20 ft. https://i.postimg.cc/4K6VcCdg/Screenshot-2019-05-04-17-44-08.png If each tile is 6 in x 6 in, that's 1/2 ft x 1/2 ft square. So every 1 sq feet of floor would take 4 tiles. https://i.postimg.cc/234M53mc/Screenshot-2019-05-04-...
- by ceilidh.erickson
Sat May 04, 2019 1:46 pm- Forum: Problem Solving
- Topic: On a scale drawing, a rectangle 1 inch by 1 and 1/3 inches
- Replies: 2
- Views: 1102
Let's set aside the fact that this is an awful floorplan. How would you find furniture to fit this house?! <i class="em em-joy"></i> If the two wall of the living room are parallel, then the kitchen and the (kitchen + living room + bath) are SIMILAR triangles. Similar triangles always have...
- by ceilidh.erickson
Sat May 04, 2019 12:52 pm- Forum: Problem Solving
- Topic: In the floor plan of an executive's beach house above
- Replies: 2
- Views: 1129
This is a COMBINATORICS problem. If we're looking for a prime tens and units digit, we're counting single-digit prime numbers: 2, 3, 5, and 7. Now we need to count the possibilities for each digit. Since we have the constraint that we're looking for all #s 0-1570, we have to be careful, since we can...
- by ceilidh.erickson
Sat May 04, 2019 12:24 pm- Forum: Problem Solving
- Topic: How many integers between 0 and 1570 have a prime tens and
- Replies: 2
- Views: 745
One very important piece of advice - DON'T SKIMP ON SLEEP! Sleep is when memory consolidation happens, so if you're staying up late to study without sleeping, you won't hold onto those memories anyway, so it's wasted effort. Sleep deprivation can essentially cause amnesia in the long run, drasticall...
- by ceilidh.erickson
Fri Apr 26, 2019 4:37 pm- Forum: Lounge
- Topic: Trouble dividing Sleep Eat Play Study Work
- Replies: 1
- Views: 2159
This question is testing PARALLELISM and MEANING. When we see "... , and prompts..." we know that we're looking for a parallel list: X, Y, and Z. Just note: we don't have to make every verb in the sentence parallel! You might be looking for: ... the surge has clogged air traffic control......
- by ceilidh.erickson
Fri Apr 26, 2019 4:13 pm- Forum: Sentence Correction
- Topic: The recent surge in the number of airplane flights has
- Replies: 1
- Views: 702
When we have variables with inequalities, we have to make sure that we don't make assumptions about the SIGN, i.e. whether it's positive or negative. If gh < 0 < gk, is g < 0? We definitely can't divide through by g to get h < 0 < k, because if g were negative, the signs would flip to h > 0 > k. The...
- by ceilidh.erickson
Fri Apr 26, 2019 3:35 pm- Forum: Data Sufficiency
- Topic: If gh < 0 < gk, is g < 0?
- Replies: 1
- Views: 447
In this divisibility question, we can either TEST CASES or use DIVISIBILITY THEORY. If a and b are positive integers divisible by 6, is 6 the greatest common divisor of a and b? (1) a = 2b + 6 Testing Cases: Case 1: b = 6 a = 2(6) + 6 = 18 the GCF of 6 and 18 is 6 --> yes. Case 2: b = 12 a = 2(12) +...
- by ceilidh.erickson
Fri Apr 26, 2019 11:47 am- Forum: Data Sufficiency
- Topic: If a and b are positive integers divisible by 6, is 6 the
- Replies: 1
- Views: 638