Search found 131 matches
Answer is B . After 1:00 PM, truck B will be moving away from Truck A and towards east, so they will form a right angle triangle with sides 6, 8, 10. (As we have to find the time when they are 10 miles apart). Both have same speed, so cover same amount of distance in same time. They will cover 6 mil...
- by puneetkhurana2000
Thu Dec 20, 2012 11:45 pm- Forum: Problem Solving
- Topic: Manhatta advanced Quant
- Replies: 2
- Views: 1244
I believe your first question is:- why the GCF of x and y can't be > x - y? This is only possible if x and y are distinct; x and y are not consecutive multiples of a certain number. e.g. x = y = 10. GCF = 10 is > 10 - 10 (0) e.g. x = 2, y = 4. GCF = 2 is = 4 - 2 (2) For all cases GCF can't be greate...
- by puneetkhurana2000
Thu Dec 20, 2012 7:29 pm- Forum: Data Sufficiency
- Topic: Greatest common factor
- Replies: 2
- Views: 989
In these fields farmers will not grow either corn or soybean. Corn can't be planted because these fields are dry enough and soybeans can't be planted despite high prices (farmers are not sure about good produce). A - Does not talk about why farmers should not plant soybeans. B - I think its a good r...
- by puneetkhurana2000
Thu Dec 20, 2012 6:52 pm- Forum: Critical Reasoning
- Topic: Centralia's corn planting! Complete the passage.
- Replies: 2
- Views: 2445
I did not understand your first question as it is not clear what is x,y, m or n? Please rephrase it clearly. For second question let us say n = 2, so consecutive multiples of 2 are 2,4,6,8,10..... The Greatest Common factor of 2( 2 *1),4( 2 *2),6( 2 *3),8( 2 *24),10( 2 *5)..... is 2, which is equal ...
- by puneetkhurana2000
Thu Dec 20, 2012 6:34 pm- Forum: Data Sufficiency
- Topic: Greatest common factor
- Replies: 2
- Views: 989
Puneet , Thank you so much ! I could not follow the part where you get -3 < x < 0 Since , x(x-3)(x+3)>0 is the equation we get after squaring and simplifying - i.e x>0 or x>-3 or x>3 then how can we write "-3 < x < 0" ? Also, Together we have, (x > 0) and (x > 3 or -3 < x < 0) the bolded ...
- by puneetkhurana2000
Thu Dec 20, 2012 3:41 pm- Forum: Data Sufficiency
- Topic: modulus problem -quick approach
- Replies: 7
- Views: 1224
For Second Question:- Is x>3 ? a)x > 0 b)square root of (x^3- 9*x + 4) > 2 Statement 1) x > 0, so x can be 1 or 4. Not Sufficient!!! Statement 2) (x^3- 9*x + 4) > 2, Taking square both sides we get x(x-3)(x+3)>0, For inequality to hold true either x > 3 or -3 < x < 0. Not Sufficient!!! Together we h...
- by puneetkhurana2000
Thu Dec 20, 2012 3:10 pm- Forum: Data Sufficiency
- Topic: modulus problem -quick approach
- Replies: 7
- Views: 1224
- by puneetkhurana2000
Thu Dec 20, 2012 2:54 pm- Forum: Data Sufficiency
- Topic: modulus problem -quick approach
- Replies: 7
- Views: 1224
You can solve this quickly by using algebra. The target statement Is |x| < 1 ? can be rephrased as Is -1 < x < 1 ? Statement 2) 1/(1-|x|) > 0 , This implies that (1-|x|) has same sign as 1, to have a overall positive value. Since numerator is positive so (1-|x|) > 0. Solving we get |x| < 1. Sufficie...
- by puneetkhurana2000
Thu Dec 20, 2012 2:52 pm- Forum: Data Sufficiency
- Topic: modulus problem -quick approach
- Replies: 7
- Views: 1224
Answer is 420, as any number of children <= 7 can be present.
So minimum cookies required are LCM of 1,2,3,4,5,6,7 i.e. 420.
Answer E.
Alternate Method:- Among options 420 is the only number divisible by all positive integers <=7.
- by puneetkhurana2000
Wed Dec 19, 2012 11:28 am- Forum: Problem Solving
- Topic: Stange Question on LCM
- Replies: 6
- Views: 1376
Brown Eyes No Brown Eyes Total
Brown Hair 0.45 0.15 0.60
No Brown Hair 0.10 0.30 0.40
Answer is 0.45/0.30 = 3/2.
Answer C.
- by puneetkhurana2000
Tue Dec 18, 2012 11:49 pm- Forum: Problem Solving
- Topic: Fraction problem
- Replies: 5
- Views: 1271
Is ab = a^2 ?, This can be rephrased as Is a = 0 or a = b ?
Statement 1) a^2 = b ^2
a = +b or - b, Not Sufficient!!
Statement 2) a^3 = b ^3
a can only be equal to b, Sufficient!!!
Answer B.
- by puneetkhurana2000
Tue Dec 18, 2012 10:38 pm- Forum: Data Sufficiency
- Topic: Does ab = a^2
- Replies: 2
- Views: 1034
- by puneetkhurana2000
Tue Dec 18, 2012 6:50 pm- Forum: Problem Solving
- Topic: integers
- Replies: 6
- Views: 1444
- by puneetkhurana2000
Tue Dec 18, 2012 6:48 pm- Forum: Problem Solving
- Topic: Interest problem
- Replies: 4
- Views: 1399
Distance covered in 10 mins = 40 miles.
Remaining (260) will be covered in = 260/400 * 60 = 39 mins.
They meet at 10 + 39 = 49 mins after 12:00 = [spoiler]12:49[/spoiler].
Answer B.
- by puneetkhurana2000
Tue Dec 18, 2012 12:48 am- Forum: Problem Solving
- Topic: Rate :Speed problem
- Replies: 1
- Views: 842
- by puneetkhurana2000
Mon Dec 17, 2012 11:54 pm- Forum: Problem Solving
- Topic: snack issues
- Replies: 6
- Views: 2032