## Search found 423 matches

Easiest way is just to write down the numbers from 1-20 and check them smallest possible number will be 5 = 3+2 Lets take the next number 6. can it be expressed as sum of multiples of 2 and 3? NO 7 = 4+3 8 = 2+6 9 = 6+3 10 = 4+6 11 = 8+3 12 = 6+6 13 = 4+9 14 = 8+6 15 = 6+9 16 = 4+12 17 = 2+15 18 = 6...

- by srcc25anu

Wed Jul 03, 2013 6:01 pm- Forum: Problem Solving
- Topic: Number Properties
- Replies:
**2** - Views:
**880**

- by srcc25anu

Wed Jul 03, 2013 9:39 am- Forum: Data Sufficiency
- Topic: Hybrid problem from Advanced GMAT quant Manhattan
- Replies:
**4** - Views:
**1087**

**By Allegation Method:**

5% ------- 100%

-----10%-----

90:5 or 18:1

Since 18 is 20 gallons, how much is 1?

1 = 20/18 = 10/9 gallons

Ans C

- by srcc25anu

Tue Jul 02, 2013 10:28 pm- Forum: Data Sufficiency
- Topic: Ratio
- Replies:
**4** - Views:
**1234**

Quote: **0 = 4xÂ² - 4x - 120 **

This should instead be 0 = 4xÂ²**+** 4x - 120

solving this gives (x+6)*(x-5)=0

or x = 5 (since x cannot be -6)

Therefore x = 5

- by srcc25anu

Tue Jul 02, 2013 11:27 am- Forum: Problem Solving
- Topic: In the figure, square LMNO has a side of length 2x + 1
- Replies:
**4** - Views:
**2590**

St1: x+y=1

Case 1: x = 1, y = 0 x+y = 1 and xy = 0; Is XY < 1? Yes

Case 2: x = 0.8, y = 0.2 x+y = 1 and xy = .16; Is XY < 1? Yes

sufficient

St2: x^2 + y^2 = 1

x = 1, y = 0 x^2 + y^2 = 1 and xy = 0; Is XY < 1? Yes

x = 0.8, y = 0.6 x^2 + y^2 = 1 and xy = .48; Is XY < 1? Yes

sufficient

Hence D

- by srcc25anu

Mon Jul 01, 2013 11:59 pm- Forum: Problem Solving
- Topic: number system
- Replies:
**2** - Views:
**850**

- by srcc25anu

Mon Jul 01, 2013 6:57 pm- Forum: Data Sufficiency
- Topic: [DS]If a, b, and c are integers and abc â‰ 0
- Replies:
**6** - Views:
**3461**

Confused between **Increase By** and **Increase To**

slightly inclined towards Increased By

Hence C

Please post the OA along with a question.

- by srcc25anu

Sun Jun 30, 2013 6:36 pm- Forum: Sentence Correction
- Topic: car mechanics sc
- Replies:
**5** - Views:
**2735**

Lets say distance between Office (Off) and Hotel (H) is 60 kms Allison starts from Off at 5:00 reached hotel at 6:00 in 1 hr therefore Allison speed = 60 m/hr St1: WHen Allison and Brit meet, Allison has covered 2/3rd the distance. Therefore Allison has covered 40 kms From this, we cant find at what...

- by srcc25anu

Sun Jun 30, 2013 5:59 pm- Forum: Data Sufficiency
- Topic: Allison and Brittany
- Replies:
**1** - Views:
**1191**

Half Distance = 60 yds Jen's speed for 1st half = 4 yd/sec Jen's TIME for 1st half = 60/4 = 15 secs Jen's speed for 2nd half = 5 yd/sec Jen's TIME for 2nd half = 60/5 = 12 secs Jen's total time = 27 secs to cover 120 yds St1: in 18 secs Jen covers (15secs * 4yd/sec) + (3sec * 5 yd/sec) = 75 yds in 1...

- by srcc25anu

Sun Jun 30, 2013 5:42 pm- Forum: Data Sufficiency
- Topic: Tough Speed, Rate, Time DS
- Replies:
**2** - Views:
**898**

St1: âˆšx > y

âˆš4 = 2 > 1 Is x>y - Yes

âˆš1/4 = Â½ > 1/3 Is x>y - No

Hence Insufficient

St2: x^3 > y

23 = 8 > 5 Is x>y - No

23 = 8 > 1 Is x>y - Yes

Hence Insufficient

Together: x^3 > y AND âˆšx > y (See attached table)

Hence Sufficient

Ans C

- by srcc25anu

Sun Jun 30, 2013 5:17 pm- Forum: Data Sufficiency
- Topic: Square Root
- Replies:
**3** - Views:
**1220**

St1: Avg unoccupied seats per row = 3.5 We don't know the number of rows so cant determine the # of unoccupied seats Insufficient St2: More than 9 rows and fewer than 12 rows so it could have either 10 or 11 rows Insufficient Together 1 + 2: We can only have 10 rows since 10 * 3.5 = 35 unoccupied se...

- by srcc25anu

Sun Jun 30, 2013 5:02 pm- Forum: Data Sufficiency
- Topic: Seats unoccupied
- Replies:
**1** - Views:
**761**

- by srcc25anu

Fri Jun 28, 2013 9:47 pm- Forum: Problem Solving
- Topic: Inequality
- Replies:
**9** - Views:
**1973**

- by srcc25anu

Thu Jun 27, 2013 10:58 pm- Forum: Critical Reasoning
- Topic: Eurozone
- Replies:
**2** - Views:
**1092**

At 15:00 there are 20 students STUDENTS WHO ENTER: from 15:03 to 15:44, every 3 minutes 3 students are added. # of 3 min intervals from 15:03 to 15:44, (44-3)+1/3 = 14 No of students who will enter = 14 * 3 = 42 STUDENTS WHO LEAVE: from 15:10 to 15:44, every 10 minutes 8 students leave the room. # o...

- by srcc25anu

Thu Jun 27, 2013 7:19 pm- Forum: Problem Solving
- Topic: At 15:00 there were 20 students in the computer lab.
- Replies:
**2** - Views:
**1841**

In D, it seems to suggest that tough leaves require a lengthy cooking time. That's incorrect. The original meaning is intended to suggest that winter greens have a lengthy cooking time which is rightly suggested by option B.

So B is correct.

- by srcc25anu

Thu Jun 27, 2013 11:13 am- Forum: Sentence Correction
- Topic: Unlike X, Y question
- Replies:
**8** - Views:
**4375**