[Official] Quant Thread for 2015!

Please explain Approach:

There are 100 students numbered 1 to 100 and 100 buckets numbered 1 to 100. The first student puts one flower each in every bucket starting from the first bucket (i.e., in the buckets numbered 1, 2, 3,...), the second student puts  two flowers each in every second bucket starting from the second bucket (i.e., in the bucket numbered 2,4,6,.........), the third student puts three flowers each in every third bucket starting from the third bucket (i.e., in the bucket numbered 3,6,9......), and so on till the hundredth student. 

How many bucket will finally have the exactly twice the number of flowers as the number on the bucket itself?

OA is 2.

http://imgur.com/IU2xJsa
What is the maximum value that  K can take??

if X+Y+Z = 10, then how many disticnt values can 2X+3Y+5Z can take?

1. 30

2. 31`

3. 28

4. 29

two trains start simultaneously from p & q towards q & p respectively at 8 am.they cross each other at 12 noon.train starting from q thereafter takes 6 hrs to reach p.on a particular day train starting from p reduced its speed and arrived at q 200 min late. at what time  trains cross each other on that day?

  • 1:30 pm
  • 2 pm
  • none of these
  • 1 pm

0 voters

Out of 20 consecutive natural numbers, in how many ways can 4 numbers be selected, such that any two among the selected numbers differ by at least 3?

OA-14C4

http://imgur.com/wzrQLfs

tiss hrm mai faida hai???

In how many ways can five boys and three girls be seated in eight equally spaced chairs around a circular table such that no two girls are seated opposite each other?

  • 24x5!
  • 12x5!
  • 24x5!3!
  • 12x5!3!

0 voters

http://imgur.com/z8xpTfT

ratio =4:3

length of SO is?

....

Certain work is completed in 4 days by certain number of workers. The employer pays Rs.10 to each worker every hour. All the workers work for 9 hrs daily. Minimum of 2 workers and maximum of 8 workers can work everyday. On Day 1 three workers are employed and five workers work on Day 4. Every consecutive day either 1 or 2 workers can be added or subtracted from the previous day.

Find the minimum number of workers that can be employed in the four days taken together? @s.goel4991 @Going_High 

A is the set of all numbers 'n' such that 3n has 7 in the units' place and n is a natural number. B is the set of all natural numbers 'm' such that the sum of their digits is divisible by 9.  C is a set of all natural odd numbers divisible by 3; and N is the set of all natural numbers. Which of the following is true?

Options:

1.A U B=C

2.A ∩ B is a subset of C

3.(A ∩ C) B = N

4.(A ∩ C) ∩ B = N

Manish and Rakesh start simultaneously but in opposite direction (Manish moving in anticlockwise direction) in a  circular track of length 120m from the same position on the track of length 120m from the same position on the track with speed 5m/s and 3 m/s resp.Every time they meet they exchange their speeds.Find the distance from the starting point (anticlockwise) of their 27th meeting.

Options:

a. 75

b. 0

c. 45

d. cannot be determined

A table is in the shape of an equilateral triangle having 3 seats along each of the three sides of the triangle.In how many ways can 9 people can sit across the table?


Can anyone please explain how 89^41=89*(89^40)=89*(..21)^40. Thanks a lot for your help.

A fair coin is tossed 10 times. The probability of getting at least 4 consecutive heads??


In a shop, there are 12 pairs of gloves of same color and size. A man steals 4 gloves. What is the probability that at least one left-right matching pair of gloves was stolen??

Solution Pls

Solution/Approach?

http://imgur.com/qZQHAKG

How is the area of ADE =0.5*AD*AM? Explain please!

X=1/80*41+1/79*42..........1/41*80

Y=1-1/2+1/3-1/4......+1/79-1/80

ratio Y/X = ?   solution plz

  • 40.5
  • 60.5
  • none
  • 50.5

0 voters