Search found 610 matches
10^8 - 10^2 / 10^7 - 10^3 =JimmyQ wrote: The value of of 10^8 - 10^2 / 10^7 - 10^3 is closest to which of the following:
a) 1 b) 10 c) 10^2 d) 10^3 e) 10^4
10^2(10^6-1) /10^3(10^4 - 1) =
10^x - 1 is very close to 10^x
10^6/10^(4+1) = 10
IMO B
- by kstv
Mon May 24, 2010 5:54 am- Forum: Problem Solving
- Topic: Exponents
- Replies: 4
- Views: 1411
It is a typical DS Q where u do not need to do any calc. K receives 10% less for the first two late contracts and 15% for the third. There were 3 late contracts. Was the total reduction less than 11%. To answer this if we know the value of each contracts. Then, it will be possible to work out the to...
- by kstv
Mon May 24, 2010 3:16 am- Forum: Data Sufficiency
- Topic: Great DS question.
- Replies: 11
- Views: 2063
At a sale all books were priced equally and all magazines were priced equally. What was the price of 3 books and 4 magazines at the sale? (1) At the sale the price of a book was $1.45 more than the price of a magazine. (2) At the sale the price of 6 books and 8 magazines was $43.70. 6 Books + 8 Mag ...
- by kstv
Mon May 24, 2010 3:01 am- Forum: Data Sufficiency
- Topic: At a sale all books were priced equally and all magazines we
- Replies: 3
- Views: 3440
(A) The neonates in a nursery where no music was played fared better than those in nursery B. (B) Nursery A contained 15 percent more premature babies than nursery B. (C) The newborns in nursery A cried less, suffered fewer minor ailments, and gained more weight than did newborns in a nursery with n...
- by kstv
Mon May 24, 2010 2:57 am- Forum: Critical Reasoning
- Topic: Babies
- Replies: 2
- Views: 2793
If BD = 25 as in option 2, is there any other value possible for BC and AB other than 20 and 15 ?
The pythagorean triplet is unique.
but option 1 is still needed to known which is BC i.e. the diameter.
- by kstv
Sun May 23, 2010 8:31 pm- Forum: Data Sufficiency
- Topic: In the figure shown, what is the area of the circular region
- Replies: 6
- Views: 6953
IMO E
The dist. has bought more than he/she could sell in summer. Maybe, just to avail of the sp. discount. He/she will have to sell them in the next qtrs. and will not like to increase the inventory again in the fall qtr.
- by kstv
Sun May 23, 2010 8:07 pm- Forum: Critical Reasoning
- Topic: eye glass manufacturer.....
- Replies: 14
- Views: 5381
A deck of card contains 2 of each - Red, Green, Blue and Yellow cards. If 2 cards are drawn randomly from the deck, what is the probability that they both are not blue? Approach (1) :- 1 - P(both are blue) P(both are blue) = 1st card is blue AND 2nd card is blue = (2/8) * (1/7) = 1/28 1 - (1/28) = ...
- by kstv
Sat May 22, 2010 9:49 pm- Forum: Problem Solving
- Topic: Probability doubt | Red, Green, Blue and Yellow Cards
- Replies: 3
- Views: 1072
odd +- odd = evennicajvch wrote:If x and y are positive integers, is the product xy even?
1) 5x-4y is even
2) 6x + 7y is even
even+- even = even
even+- odd = odd
IMH D
- by kstv
Sat May 22, 2010 6:26 pm- Forum: Data Sufficiency
- Topic: Evens
- Replies: 2
- Views: 1111
What is the maximum number of rectangular blocks,each with dimensions 12 centimeters by 6 centimeters by 4 centimeters, that will fit inside rectangular Box X ? (1) When Box X is filled with the blocks and rests on a certain side, there are 25 blocks in the bottom layer. (2) The inside dimensions of...
- by kstv
Sat May 22, 2010 6:12 pm- Forum: Data Sufficiency
- Topic: Geometry DS
- Replies: 1
- Views: 1100
No of women : children = 5: 2 2) No of women < 30 so possible no of women = 5,10,15.....25 Not Suff 1) No of Children : men = 5:11 Women : Children : Men 25:10:22 cos W : C = 5:2 & C : M = 5:11 The ratios are known but not the exact nos. Insuff Together it is 25 W which is < 30, 10 children &...
- by kstv
Sat May 22, 2010 6:03 pm- Forum: Data Sufficiency
- Topic: Tour
- Replies: 2
- Views: 1161
2) AB = 2BC for ABC to be a isos. triangle AB should be = AC (if AC = BC, then AC+BC = AB which is not possible as any two sides have to be > the third side) but no info whether they are 1) If x° = y° then it is a isos triangle the obverse is not suff to negate that it is not a isos triangle Combi...
- by kstv
Sat May 22, 2010 10:03 am- Forum: Data Sufficiency
- Topic: Geometry
- Replies: 7
- Views: 1674
(3^2n) - 1 / 2^(n+3)Aman verma wrote:Q: ( 3^2n ) - 1 is divisible by 2^(n+3) for n =
a)1 b)2 c)3 d)4 e)None of these
IMO E
- by kstv
Sat May 22, 2010 9:47 am- Forum: Problem Solving
- Topic: Number Properties
- Replies: 10
- Views: 1533
The Answer E. The statements alone are not sufficient. When the two statements are combined: %93 + %94 = 90 %94 +%95 = 90 We can deduct that People aged 93 & 95 must have the same % and it must be <= 10% (so that total % is not over 100). Some examples that fit in are: %93 --- % 94 --- % 95 1 -...
- by kstv
Sat May 22, 2010 12:04 am- Forum: Data Sufficiency
- Topic: 345) Find how many people
- Replies: 2
- Views: 1128
First Ride - Probability of riding any one car be it A,B and C = 1/3 if it is A Second Ride - Prob of choosing either B or C = 2/3, if it is B Third Ride - Has to be C , so prob is 1 1/3*2/3 = 2/9 Same result, but the approach is diff. Here I not assuming that the passenger deliberately chooses a pa...
- by kstv
Fri May 21, 2010 10:27 pm- Forum: Problem Solving
- Topic: Rollar coaster probability
- Replies: 7
- Views: 1633
If 2 integers between -5 & 3, inclusive, are chosen at random, which of the following has the highest probability ? A) The sum of the 2 integers is even B) The sum of the 2 integers is odd C) The product of the 2 integers is even D) The product of the 2 integers is odd E) The product of the 2 i...
- by kstv
Fri May 21, 2010 8:42 pm- Forum: Problem Solving
- Topic: any takers? :)
- Replies: 11
- Views: 1843