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Which of the following is/are perfect numbers if "Perfe
Which of the following is/are perfect numbers if "Perfect Number" is defined as number for which sum of all it's factors is twice the number.
I) 6
II) 28
III) 36
A) I only
B) II only
C) III only
D) I and II only
D) I, II and III
- by GMATinsight
Mon Oct 08, 2018 12:18 am- Forum: Problem Solving
- Topic: Which of the following is/are perfect numbers if "Perfe
- Replies: 2
- Views: 702
If a, b, c, d, e are integers such that a<b<c<d<
If a, b, c, d, e are integers such that a<b<c<d<e, then what is the positive difference between averages of Sets (b, c, d, e) and (a, b, c, d)
1) a, b, c, d, e are consecutive integers
2) a = 5
Source: http://www.GMATinsight.com
- by GMATinsight
Sat Sep 29, 2018 10:20 pm- Forum: Data Sufficiency
- Topic: If a, b, c, d, e are integers such that a<b<c<d<
- Replies: 1
- Views: 610
If a, b, c, d, e are consecutive positive integers such that
If a, b, c, d, e are consecutive positive integers such that a<b<c<d<e, then what is the positive difference between averages of Set (b, c, d, e) and (a, b, c, d)
A) 0.25
B) 0.5
C) 0.75
D) 1
E) 1.5
Source: http://www.GMATinsight.com
- by GMATinsight
Sat Sep 29, 2018 10:18 pm- Forum: Problem Solving
- Topic: If a, b, c, d, e are consecutive positive integers such that
- Replies: 2
- Views: 824
Two inlets P and Q are working on alternate hour for filling
Two inlets P and Q are working on alternate hour for filling an empty tank and only one inlet works at any point of time. How much time will it take to fill the tank completely? 1) Inlet P can fill the tank in 10 hours while working alone while Inlet Q takes 12 hours to fill the tank alone 2) Inlet ...
- by GMATinsight
Thu Sep 27, 2018 9:49 pm- Forum: Data Sufficiency
- Topic: Two inlets P and Q are working on alternate hour for filling
- Replies: 2
- Views: 677
Two inlets P and Q are working on alternate hour for filling
Two inlets P and Q are working on alternate hour for filling an empty tank and only one inlet works at any point of time. How much time will it take to fill the tank completely? 1) Inlet P can fill the tank in 10 hours while working alone while Inlet Q takes 15 hours to fill the tank alone 2) Inlet ...
- by GMATinsight
Thu Sep 27, 2018 9:48 pm- Forum: Data Sufficiency
- Topic: Two inlets P and Q are working on alternate hour for filling
- Replies: 1
- Views: 602
ABCD is a square of side 4 inch. If each corner of square is
ABCD is a square of side 4 inch. If each corner of square is cut identically so that resultant structure becomes regular eight sided polygon. What is length of side of octagon? A) [m]4/ (2-√2)[/m] B) [m]2√2/ (√2+1)[/m] C) [m]4(√2-1)[/m] D) [m]4(√2+1)[/m] E) [m]4/ (√2-1)[/m] www.GMATinsig...
- by GMATinsight
Thu Sep 20, 2018 9:38 pm- Forum: Problem Solving
- Topic: ABCD is a square of side 4 inch. If each corner of square is
- Replies: 2
- Views: 728
What is the biggest positive integer which will always divide n(n+1)(n+2) evenly for any even integer value of n? a) 2 b) 3 c) 6 d) 12 e) 24 Source: www.GMATinsight.com To find the biggest number, we must minimize the expression, so let's use 1, 2 and 3. 1x2x3 = 6 is the largest number that will AL...
- by GMATinsight
Wed Sep 12, 2018 7:08 am- Forum: Problem Solving
- Topic: What is the biggest positive integer which will always divid
- Replies: 5
- Views: 812
What is the biggest positive integer which will always divid
What is the biggest positive integer which will always divide n(n+1)(n+2) evenly for any even integer value of n?
a) 2
b) 3
c) 6
d) 12
e) 24
Source: www.GMATinsight.com
- by GMATinsight
Wed Sep 12, 2018 5:22 am- Forum: Problem Solving
- Topic: What is the biggest positive integer which will always divid
- Replies: 5
- Views: 812
a family has 5 children, what is the probability that there
a family has 5 children, what is the probability that there are 3 boys and 2 girls among the children?
A) 1/32
B) 1/16
C) 3/32
D) 1/4
E) 5/16
Source: www.GMATinsight.com
Answer: Option E
- by GMATinsight
Mon Sep 10, 2018 9:48 pm- Forum: Problem Solving
- Topic: a family has 5 children, what is the probability that there
- Replies: 3
- Views: 675
What is the value of integer n ? (1) n(n + 1) = 20 (2) 6!/
What is the value of integer n ?
(1) n(n + 1) = 20
(2) 6!/(n!)(6-n)! = 15
Source: www.GMATinsight.com
- by GMATinsight
Sat Sep 08, 2018 4:28 am- Forum: Data Sufficiency
- Topic: What is the value of integer n ? (1) n(n + 1) = 20 (2) 6!/
- Replies: 1
- Views: 732
What is the probability of n(n+1)(n+2) being evenly divisibl
What is the probability of n(n+1)(n+2) being evenly divisible by 8?
1) n is an integer
2) 1≤ n ≤ 96
Source: www.GMATinsight.com
- by GMATinsight
Sat Sep 08, 2018 4:27 am- Forum: Data Sufficiency
- Topic: What is the probability of n(n+1)(n+2) being evenly divisibl
- Replies: 2
- Views: 657
- by GMATinsight
Sun Jul 15, 2018 10:15 pm- Forum: Problem Solving
- Topic: Time and work problem
- Replies: 6
- Views: 4214
If x < 50, Is Positive Integer x a Prime Number? 1) When
If x < 50, Is Positive Integer x a Prime Number?
1) When x is divided by 4 the remainder is 3
2) x is divisible neither by 3 nor by 5
Source: www.GMATinsight.com
Answer: Option C
- by GMATinsight
Fri Jun 08, 2018 3:18 am- Forum: Data Sufficiency
- Topic: If x < 50, Is Positive Integer x a Prime Number? 1) When
- Replies: 1
- Views: 738
How many factors of 3600 are divisible by 6? A) 45 B) 24 C)
How many factors of 3600 are divisible by 6?
A) 45
B) 24
C) 18
D) 15
E) 9
Source : www.GMATinsight.com
- by GMATinsight
Tue May 29, 2018 6:48 am- Forum: Problem Solving
- Topic: How many factors of 3600 are divisible by 6? A) 45 B) 24 C)
- Replies: 2
- Views: 3024
Is positive integer x a prime number? 1) [m]x^2+x[/m] ≤ 1
Is positive integer x a prime number?
1) x^2+x ≤ 10
2) x does not have odd number of factors
Source: www.GMATinsight.com
Answer: option C
- by GMATinsight
Tue May 08, 2018 11:23 pm- Forum: Data Sufficiency
- Topic: Is positive integer x a prime number? 1) [m]x^2+x[/m] ≤ 1
- Replies: 1
- Views: 710