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I am asking about the problemps63739 wrote:Ah.. I thought you were asking specifically about the question.
Well if your question is remainder when 6 is devided by 120, answer is 6 and
if your question is 6!/120! then answer is 1
I am asking about 3!/5! is it 1 or 6??
(3! =6 and 5! is 120)
- by ajith
Thu May 06, 2010 5:56 am- Forum: Problem Solving
- Topic: (x – 2)! is divided by x
- Replies: 10
- Views: 2557
Two-fifths of the voters promise to vote for P and the rest promise to vote for Q. Of these, on the last day, 15% of the voters went back on their promise to vote for P and 25% of voters went back of their promise to vote for Q, and P lost by 2 votes. What was the total number of voters? (A) 84 (B)...
- by ajith
Thu May 06, 2010 5:55 am- Forum: Problem Solving
- Topic: went back on their promise
- Replies: 2
- Views: 8697
well what is the remainder when 6 is divided by 120
is it 6 or 1 ???
ps63739 wrote:It asks about prime number.
That doesn't solve the problem, does it???
- by ajith
Thu May 06, 2010 5:49 am- Forum: Problem Solving
- Topic: (x – 2)! is divided by x
- Replies: 10
- Views: 2557
A four digit number 5775 is written 8000 times (i.e. a 32000-digit number) side by side. What is the remainder when this number is divided by 18? (A) 1 (B) 3 (C) 5 (D) 9 (E) 12 A four digit number 5775 is written 7998 times followed by 8 zero's is divisible by 18 (24*7998 is a multiple of 9) now we...
- by ajith
Thu May 06, 2010 5:47 am- Forum: Problem Solving
- Topic: a 32000-digit number) side by side
- Replies: 3
- Views: 2554
What is the remainder when (x – 2)! is divided by x? (x is a prime number) (A) 0 (B) 1 (C) x - 6 (D) x - 3 (E) x - 1 (x-2)!/x! = 1/(x*(x-1)) (x-2)! divided by x! will leaves the same remainder when 1 is divided by x*(x-1) so the answer must be 1 on second thoughts, what is the remainder when 10 i...
- by ajith
Thu May 06, 2010 5:43 am- Forum: Problem Solving
- Topic: (x – 2)! is divided by x
- Replies: 10
- Views: 2557
The sum of the first 100 positive integers is 5,050. What is the sum of the first 200 positive integers? (A) 10,100 (B) 10,200 (C) 12,400 (D) 15,050 (E) 20,100 [spoiler] Sum of first 100 positive integers = 5050 Sum of next 100 positive integers = 100*100 + 5050 = 15050 Sum of first 200 positive in...
- by ajith
Thu May 06, 2010 5:03 am- Forum: Problem Solving
- Topic: sum of the first
- Replies: 6
- Views: 1953
A merchant purchased a jacket for $60 and then determined a selling price that equaled the purchase price of the jacket plus a markup that was 25 percent of the selling price. During a sale, the merchant discounted the selling price by 20 percent and sold the jacket. What was the merchant’s gross...
- by ajith
Thu May 06, 2010 5:02 am- Forum: Problem Solving
- Topic: the jacket plus
- Replies: 1
- Views: 983
Erica has $460 in 5-and 10-dollar bills only. If she has fewer 10-than 5-dollar bills, what is the least possible number of 5-dollar bills she could have? (A) 27 (B) 28 (C) 29 (D) 30 (E) 32 Say Erica has x 5 Dollar Bills and y 10 Dollar bills 5x+10y =460 and x>y 5x +10x >460 15x>460 x>31.66 The lea...
- by ajith
Thu May 06, 2010 4:59 am- Forum: Problem Solving
- Topic: she has fewer 10
- Replies: 6
- Views: 1788
1) yields 2 values for xkstv wrote:aniruddhkashyap wrote:Need help with the following DS questions
Q7:
Is xy > x^2y^2?
(1) 14x^2 = 3
(2) y^2 = 1
2) yields 2 values for y
Each are independently not sufficient
Combined also not sufficient since we cannot be sure about the signs of x and y, E
- by ajith
Thu May 06, 2010 12:45 am- Forum: Data Sufficiency
- Topic: Courtsey aniruddhkashyap I
- Replies: 1
- Views: 979
1) is not sufficient since n can be 3 or 5kstv wrote:aniruddhkashyap wrote:Need help with the following DS questions
Q36:
If n is an integer and 100 < n <200, what is the value of n?
(1) 36n is an odd integer.
(2) 45n is an even integer.
2) is sufficient since n can only be 4 in this case, B
- by ajith
Thu May 06, 2010 12:43 am- Forum: Data Sufficiency
- Topic: Courtesy II
- Replies: 4
- Views: 1577
----r---s---t--- q)On the number line shown above, is zero halfway between r and s? (1) s is to the right of 0 (2) the distance between t and r is same as the dis b\w t and -s. 1) is clearly not sufficient 2) t-r = t+s [this can be framed only because they have given the number line] -r=s Sufficien...
- by ajith
Thu May 06, 2010 12:40 am- Forum: Data Sufficiency
- Topic: number line
- Replies: 2
- Views: 1492
Is the standard deviation of the set of measurements x1, x2, x3....x20 less than 3? A) The variance for the set of measurements is 4. B) For each measurement, the difference between the mean and that measurement is 2. Variance in this Example is if mean is m (m-x1)^2+(m-x2)^2 ......+ (m-x20)^2)/20 ...
- by ajith
Tue May 04, 2010 2:51 am- Forum: Data Sufficiency
- Topic: Standard deviation of a set
- Replies: 5
- Views: 5898
50 persons can complete the work in 100 days. In how many days will the work be completed if 10 persons start the work and 10 person join after every 10 days? Total work = 5000 man days Total work done in first 10 days = 100 man days Total work done in second 10 days = 200 man days Total work done ...
- by ajith
Thu Apr 29, 2010 4:29 am- Forum: Problem Solving
- Topic: Work work
- Replies: 7
- Views: 1301
The points R, T, and U lie on a circle that has radius 4. If the length of arc RTU is 4pi /3, what is the length of line segment RU? A. 4/3 B. 8/3 C. 3 D. 4 E. 6 The perimeter of the circle = 8pi The length of the arc = 4pi/3 Angle subtended at the center = 360* (4pi/3)/8pi = 60 Triangle ORU is an ...
- by ajith
Thu Apr 29, 2010 2:16 am- Forum: Data Sufficiency
- Topic: Circle
- Replies: 1
- Views: 1245
Just wondering, why doesn't 1. or 2. contain the word 'only'getso wrote:How many distinct prime divisors does a positive integer N have?
1. 2N has one prime divisor
2. 3N has one prime divisor
- by ajith
Wed Apr 28, 2010 10:45 pm- Forum: Problem Solving
- Topic: Distinct prime factors
- Replies: 2
- Views: 1615