Search found 1179 matches
More precisely, x can be any integer greater than 1.yellowho wrote:Jut to clarify these all works as X:
2,6,10, 14, 18 etc.........
- by Rahul@gurome
Fri Jan 21, 2011 10:29 pm- Forum: Problem Solving
- Topic: Exponent
- Replies: 4
- Views: 1045
How did you go from: 9 < (30/z) < 12.5 To: (30/12.5) < z < (30/9) You can do that in any of the following way. Method - 1 Note that, 9 < (30/z) < 12.5 is actually two inequalities, 1. 9 < (30/z) => z < (30/9) AND 2. (30/z) < 12.5 => z > (30/12.5) Combine the results => (30/12.5) < z < (30/9) Method...
- by Rahul@gurome
Fri Jan 21, 2011 10:26 pm- Forum: Problem Solving
- Topic: Weight
- Replies: 6
- Views: 1140
If a fair die with six sides is tossed 6 times, what is the probability that at least two of outcomes will be the same? For this problem, it is easier to calculate the complement probability of the event rather than the probability of the event itself. Probability that at least two outcomes are sam...
- by Rahul@gurome
Fri Jan 21, 2011 2:29 am- Forum: Problem Solving
- Topic: Combo
- Replies: 5
- Views: 1107
Zach picked some pumpkins to give to Ann, Beth and Chuck. He gave the 2 heaviest pumpkins to Ann, and the 5 lightest pumpkins to Beth. The combined weight of the two heaviest pumpkins is 25% of the total weight of all the pumpkins Zach picked. The combined weight of the five lightest pumpkins is 45...
- by Rahul@gurome
Fri Jan 21, 2011 2:12 am- Forum: Problem Solving
- Topic: Weight
- Replies: 6
- Views: 1140
Which of the following lists the number of points at which a circle can intersect a parallelogram ? (A) 2, 4, and 8 only (B) 2, 4, 6 and 8 only (C) 1, 2, 3, 4, 6 and 8 only (D) 2, 3, 4 , 5, 6, 7 and 8 only (E) 1, 2, 3, 4, 5, 6, 7 and 8 Note that if a line just touches a circle, i.e. the line is a t...
- by Rahul@gurome
Fri Jan 21, 2011 1:51 am- Forum: Problem Solving
- Topic: Geometry - parallelograms and circles
- Replies: 2
- Views: 2259
The area of the two rectangle is 84 sq m .The difference between the length and the breadth of the first rectangle is a perfect square. The sum of the length and the breadth of the second rectangle gives the same perfect square. Find the dimensions of the two rectangle. Say, dimension of the first ...
- by Rahul@gurome
Fri Jan 21, 2011 1:46 am- Forum: Problem Solving
- Topic: dimensions of the two rectangle
- Replies: 1
- Views: 1017
In how many ways can 16 different gifts be divided among four children if there is no restriction on the number of gifts that each child can receive? In other words, a child can receive as few as zero gifts and as many as 16 gifts? This type of problems can be solved by the famous "stick-separ...
- by Rahul@gurome
Fri Jan 21, 2011 1:19 am- Forum: Problem Solving
- Topic: combo
- Replies: 14
- Views: 4297
How many integers from 100,000 to 1,000,000 are such that each integer contains no repeated digits, and the integer’s digits are arranged in ascending order from least to greatest? In other words, the question is asking how many 6 digit integers in which all the integers are different and they ar...
- by Rahul@gurome
Fri Jan 21, 2011 1:13 am- Forum: Problem Solving
- Topic: Arrangements
- Replies: 2
- Views: 961
(1+5^1000)/2^(X) is not integer. What is X?. There may be more than 1 value of x. A proper question should ask the minimum integral value of x. Now note that, 5 = (4 + 1) = (2² + 1) Thus any power of 5 will be of the of the form (4n + 1), where n is any non-negative integer. Thus, (any power of 5 ...
- by Rahul@gurome
Fri Jan 21, 2011 12:54 am- Forum: Problem Solving
- Topic: Exponent
- Replies: 4
- Views: 1045
The function f(x) is such that f(3x+1) = 3f(x) + 1 for all values of x. If f(2)=5, then f(7)=? We know f(2) and our target is to determine the value of f(7). How we can do that? One quiet obvious way is to express f(7) in terms of f(2). Can we do that? Yes! From the relations given, we can do that ...
- by Rahul@gurome
Thu Jan 20, 2011 11:52 pm- Forum: Problem Solving
- Topic: Functions
- Replies: 7
- Views: 1275
A right triangle has perimeter 20. If the sum of the squares of the triangle’s three sides is 162, what is the area of the triangle? Say, length of sides of the triangle are a, b, and c and c is the hypotenuse. Thus, area of the triangle = (ab)/2 Hence, (a + b + c) = 20 and (a² + b² + c²) = 16...
- by Rahul@gurome
Thu Jan 20, 2011 11:43 pm- Forum: Problem Solving
- Topic: Geo
- Replies: 4
- Views: 1008
can the number 1 , 2, 3, 4... in a series be expressed in such a manner that they are not following that trend. First of all, the term "series" always does not mean that there must exist any particular relation between the terms. Any sequence of integers or number can be a series. So unle...
- by Rahul@gurome
Thu Jan 20, 2011 9:34 am- Forum: Data Sufficiency
- Topic: Cambridge tests -plz explain
- Replies: 8
- Views: 1454
If y is a positive integer, what is the remainder when y is divided by 6? 1) The remainder is 1 when y-1 is divided by 6 2) The remainder is 0 when 3y is divided by 6 Statement 1: Implies (y - 2) is divisible by 6. Hence y leaves a remainder of 1 when divided by 6. Sufficient Statement 2: 3y is div...
- by Rahul@gurome
Thu Jan 20, 2011 7:24 am- Forum: Data Sufficiency
- Topic: Cambridge tests - dont get tricked....
- Replies: 2
- Views: 919
I chose D, however the OA is given as B. OE says (1) looks good, but does not actually tell us that the series continues in the same manner beyond the terms listed' thus it is not sufficient. Statement 1 tells us specifically about the first four terms, which is not sufficient to conclude that all ...
- by Rahul@gurome
Thu Jan 20, 2011 6:59 am- Forum: Data Sufficiency
- Topic: Cambridge tests -plz explain
- Replies: 8
- Views: 1454
Refer to this post: http://www.beatthegmat.com/incorrect-og ... tml#325918
The problems are almost same.
- by Rahul@gurome
Thu Jan 20, 2011 6:38 am- Forum: Problem Solving
- Topic: 3 digit integer pnc
- Replies: 2
- Views: 892