## Search found 139 matches

(1+âˆš3)^1/2 * (1+âˆš3)^1/2 * [1 + (1-âˆš3)]^1/2

(1+âˆš3)^1/2 * [1+âˆš3+1-3]^1/2

(1+âˆš3)^1/2 * (âˆš3-1)^1/2

(3-1)^1/2

âˆš2

- by sacx

Thu Aug 20, 2009 2:48 am- Forum: Problem Solving
- Topic: simplifying square roots
- Replies:
**9** - Views:
**1584**

Stmt I

f(2) = 100

a*2 = 100

a = 50

We can find out f(1)

Suff

Stmt II

f(3) = -1000

a*3 = -1000

a = -1000/3

We can find out f(1)

Suff

D

- by sacx

Fri Aug 14, 2009 2:08 am- Forum: Problem Solving
- Topic: f(n)
- Replies:
**1** - Views:
**698**

x1 = 3 x2 = 2(3) - 1 = 5 x3 = 2(5) - 1 = 9 x4 = 2(9) - 1 = 17 x5 = 2(17) - 1 = 33 Now we can write the sequence as x1 = 2^1 + 1 x2 = 2^2 + 1 x3 = 2^3 + 1 x4 = 2^4 + 1 x5 = 2^5 + 1 . . . . x19 = 2^19 + 1 x20 = 2^20 + 1 x20 - x19 = 2^20 + 1 - (2^19 + 1) = 2^20 + 1 - 2^19 - 1 = 2^20 - 2^19 = 2^19 (2 - ...

- by sacx

Fri Aug 14, 2009 2:02 am- Forum: Problem Solving
- Topic: sequence
- Replies:
**2** - Views:
**912**

- by sacx

Tue Jul 28, 2009 3:05 am- Forum: Sentence Correction
- Topic: car drive
- Replies:
**11** - Views:
**1525**

My solution: y takes 2t days to complete 2w of work x takes 2(t+2) days to complete 2w.. x+y takes 24/5 days to complete 2w work. and while i created the equation i assumed 2w as 1 unit. so equation will be: 1/2t + 1/(2(t+2)) = 5/24 by solving this i get t = 4, so it takes 6 days for x to produce 2...

- by sacx

Wed Jun 10, 2009 3:17 am- Forum: Problem Solving
- Topic: work
- Replies:
**3** - Views:
**776**

- by sacx

Wed Jun 10, 2009 3:12 am- Forum: Problem Solving
- Topic: saving
- Replies:
**3** - Views:
**793**

- by sacx

Wed Jun 10, 2009 3:11 am- Forum: Problem Solving
- Topic: coin
- Replies:
**3** - Views:
**808**

I am getting 12 days. did you calculate it for W products of 2W?

y = rate of work for Y and x = rate of work for X

y = W/t

x = W/t+2

x+y = 5W/12

5W/12 = W/t + W/t+2

5/12 = 1/t + 1/t+2

t = 4

y = W/4

x = W/6

Now to produce 2W products, x = 2W/(W/6) = 12 days

- by sacx

Wed Jun 10, 2009 2:52 am- Forum: Problem Solving
- Topic: work
- Replies:
**3** - Views:
**776**

Let number of already existing houses = 100

New established = 300

60% of already existing houses = 60

76% of new established houses = 76*3 = 228

total house sold = 228+60 = 288

Percentage = (288/400 ) * 100 = 72%

- by sacx

Wed Jun 10, 2009 2:34 am- Forum: Problem Solving
- Topic: houses
- Replies:
**2** - Views:
**1044**

- by sacx

Wed Jun 10, 2009 2:29 am- Forum: Problem Solving
- Topic: series
- Replies:
**2** - Views:
**951**

let y be the total number of students accepted

80% of y = x

y = x *100/80

y = 1.25 x

so college need to accept 1.25 times the number of seats available.

- by sacx

Wed Jun 10, 2009 2:21 am- Forum: Problem Solving
- Topic: GMATprep: college admissions
- Replies:
**2** - Views:
**759**

Even I am getting 2

solving the two equations we get x > -3/2 and x < -4/3 and only 2 lies between these two points

- by sacx

Tue Jun 09, 2009 7:26 am- Forum: Problem Solving
- Topic: number
- Replies:
**1** - Views:
**784**

total possibilities = 8

HHH

HHT

HTH

THH

TTT

TTH

THT

HTT

same side up = 2 (HHH,TTT)

probability = 2/8 = 1/4

- by sacx

Tue Jun 09, 2009 7:22 am- Forum: Problem Solving
- Topic: coin
- Replies:
**2** - Views:
**890**

I am getting 12 people and $298. Don't know where I am going wrong

first person = 1

2nd = 2, 3rd = 4, 4th = 7 and the sequence continues as 11,16,22,29,37, 46,56,67

- by sacx

Thu Jun 04, 2009 5:17 am- Forum: Problem Solving
- Topic: ap
- Replies:
**3** - Views:
**749**

**When you need to convert Km/hr into m/s multiply it by 5/18**

eg: 36 km/hr = 36 *5/18 = 10 mps

**When you need to convert m/s to km/hr multiply it by**

*18/5*eg: 20 m/s = 20 * 18/5 = 72 km/hr

- by sacx

Tue Jun 02, 2009 6:27 am- Forum: Problem Solving
- Topic: Gmat prep 1 Ques
- Replies:
**9** - Views:
**1261**