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One more way.

x + 15x/100 = 207
115x = 20700
x = 12

by rintoo22

Sat Apr 13, 2013 3:56 am
Forum: Problem Solving
Topic: Help needed with OG question 135
Replies: 7
Views: 1638

Original price = x
15% less = 85x/100
Further in the question it is stated that 85x/100 = 68 => x = 80 (Original Price)
Price again raised by 25% on 68. Therefore new price 85

New Price (85) - Original Price (80) = 5 Answer D.

by rintoo22

Sat Apr 13, 2013 3:01 am
Forum: Problem Solving
Topic: Percentage problem
Replies: 4
Views: 1392

Hi Anju, Thanks for the awesome response as always. However I have a query Statement 2 : To halve the concentration of bleach in her solution, Traci would need to add 2.4y liters of water, and reduce the number of liters of bleach by 1. The new concentration eq was framed as follows New concentratio...

by rintoo22

Sun Apr 07, 2013 12:01 pm
Forum: Data Sufficiency
Topic: Solutions
Replies: 6
Views: 2396

DS(Word Translation)

At a fruit stand yesterday, the price of each apple was $0.10 more than the price of each orange. What was the total revenue from the sale of oranges at the fruit stand yesterday? (1) The number of oranges sold at the fruit stand yesterday was 5 more than the number of apples. (2) The total revenue ...

by rintoo22

Sun Apr 07, 2013 1:50 am
Forum: Data Sufficiency
Topic: DS(Word Translation)
Replies: 2
Views: 866

The price of lunch for 15 people was $207.00,
including a 15 percent gratuity for service. What was
the average price per person, EXCLUDING the
gratuity?

(A) $11.73
(B) $12.00
(C) $13.80
(D) $14.00
(E) $15.87
x+15/100(x)= 207
x=180
180/15 = 12 ... Ans B.

by rintoo22

Sun Apr 07, 2013 1:08 am
Forum: Problem Solving
Topic: How to do some calculation fast
Replies: 7
Views: 2031

a trustee invested a total of $100,000, more than half of which was invested at 6 percent simple interest and the rest of which was invested at 8 percent simple annual interest. what amount was invested at 8 percent? 1) the total annual income on the investment was $6800 2) if twice as much had bee...

by rintoo22

Sat Apr 06, 2013 11:06 pm
Forum: Data Sufficiency
Topic: help!
Replies: 3
Views: 1052

DS(Number System)

If M is a positive integer, then M^3 has how many digits?
(1) M has 3 digits.
(2) M^2 has 5 digits

I have solved the issue. Answer is E. However I am lookign for an easier and definitive way. Please help.

by rintoo22

Sat Apr 06, 2013 12:49 pm
Forum: Data Sufficiency
Topic: DS(Number System)
Replies: 3
Views: 1220

DS(Statistics)

If the average (arithmetic mean) of the assessed values of x houses is $212,000 and the average of the assessed values of y other houses is $194,000, what is the average of the assessed values of the x+y houses? (1) x+y=36 (2) x=2y The way I solved it. Total cost of the x houses = 212000x Total cost...

by rintoo22

Sat Apr 06, 2013 12:35 pm
Forum: Data Sufficiency
Topic: DS(Statistics)
Replies: 3
Views: 1153

PS(Geometry)

The sides of a square region, measured to the
nearest centimeter, are 6 centimeters long. The
least possible value of the actual area of the
square region is
A.36.00 sq cm
B.35.00 sq cm
C.33.75 sq cm
D.30.25 sq cm
E.25.00 sq cm

How to approach such questions ?

by rintoo22

Sat Apr 06, 2013 12:20 pm
Forum: Problem Solving
Topic: PS(Geometry)
Replies: 4
Views: 3078

Hi Depali,

Please post the questions.

by rintoo22

Sat Apr 06, 2013 12:13 pm
Forum: Problem Solving
Topic: How to do some calculation fast
Replies: 7
Views: 2031
by rintoo22

Sat Apr 06, 2013 11:45 am
Forum: Data Sufficiency
Topic: Number theory -2
Replies: 4
Views: 1400

Hi Brent, Can you please elaborate on Statement 1: The units digit of 2K/100 is 6 If the units digit of 2K/100 is 6, then the hundreds digit of 2K must be 6 If the hundreds digit of 2K is 6, then the hundreds digit of K must be 3 Since we can answer the target question with certainty, statement 1 is...

by rintoo22

Sat Apr 06, 2013 9:49 am
Forum: Data Sufficiency
Topic: Number theory -2
Replies: 4
Views: 1400

Positive or Negative integers that are divisible by 2 are called Even. One more important thing, which we tend to forget is "0 as an even integer".

by rintoo22

Sat Apr 06, 2013 1:36 am
Forum: Problem Solving
Topic: do -2 and -4 and - 6 etc .... are even
Replies: 2
Views: 1039

Hi srcc25anu,

your method is rt "I would also test any combination". However in this question it asks greatest possible value. So in my opinion, you answer c)2 is correct in an essence but it not the greatest.
Greatest would be 3.

by rintoo22

Fri Apr 05, 2013 1:06 pm
Forum: Problem Solving
Topic: Algebra -1
Replies: 5
Views: 1306

Hi,

I did this type of question few days ago. If the question mentions greatest possible value, then we can make one of the 2 variables as 0.

eg. x=0;y=3

lets put the values in 2^x + 2^y = x^2 + y^2
2^0+2^3 = 0^2 + 3^2
9=9

So |x-y| = 3.

by rintoo22

Fri Apr 05, 2013 12:48 pm
Forum: Problem Solving
Topic: Algebra -1
Replies: 5
Views: 1306