please explanation needed

[jess_84]

1. In a class of 500 students, the marks percentile as given. If f is 20%, g is 40% and h is 60%, then
Col A: The percentile by which g is more than f
Col B: The percentile by which h is more than g


2. Given percentiles of 3 sections as 20 30 and 40.



Col A: Number of people between the first two

Col B: Number of people between the last two


3. Given three sets R1 = {-1, -2, -3}, R2 = {1, 2, 3} and R3 = {-3, -2, -1, 1, 2, 3}. And Standard Deviation of R1 is S1, Standard Deviation of R2 is S2 and Standard Deviation of R3 is S3.
I. S1 > S2
II. S2 < 0
III. S3 = 0
A. Only I
B. Only II
C. Only III
(Similar to this)


4. Given the standard deviation of a set of four numbers as zero. If each number in the set is added by 10 and divided by 7, then what is the new standard deviation?

5.Given two sets S: {22, 24, 27, 29, 32} and T: {222, 224, 227, 229, 232}. If standard deviation of S is X, then what is the value of T?

A. x

B. 2x

C. x + 200

D. x + 400
& so on....

6.Given that there are 'x' boxes and boxes are filled with equal number of balls. If 3 boxes are filled with 12 balls each, then 5 balls are left after filling. Find the value of 'x'?
(Something like this)



7. There are ‘x’ boxes and in each of the boxes, same number of balls are placed. If fewer by 3 boxes are taken and 12 balls are placed into all boxes equally, then 5 balls are left. What is the number of boxes?
A. 28
B. 31
C. 54
& so on………



8.Given that there are 10 balls and 10 bags and 3 balls are of same kind. In how many ways these ‘10’ balls can be arranged in 10 bags, such that no bag should be left empty?
(Similar to this)



9.There are certain number of toys, distributed equally among ‘x’ boxes. Now, if 3 fewer boxes are taken and 12 toys each are distributed into all the boxes equally, then 5 toys left after the distribution. Find the value of ‘x’?


10.If 33 toys are distributed among 7 boxes. Then which of the following must be true?
A. There will be more than 5 toys, in at least one box
B. There are two boxes which must have equal number of toys.
& so on…………..

circle:

11.Given a figure with circle in which a line passes through the centre and another line is a tangent at the bottom of the circle. These two lines are parallel. Now a line is drawn connecting the two points where the lines cut across the circle and it’s a hypotenuse. Asked the angle formed by the line?


12.Given a circle with length of arc as '3π/2' and area of the sector as 'π'. Find is the value of radius of the circle?

13


Col A: The area of circle with radius 3
Col B: The area of circle with circumference 6


14.There are 3 points A, B, C on a circle. With BC as diameter of length 20 and AB is of length 10, what is the angle <ABC?


15.Given a figure of a circle. This circle has a chord AB which is not the diameter. The length of the chord is 5 and the radius is also 5. Find the area of the sector marked by chord AB?




Integer:
16.The reflection of a positive integer is obtained by reversing the digits. For example, 321 is the reflection of 123. The difference between a five-digit integer and its reflection must be divisible by which of the following?
A. 2
B. 4
C. 5
D. 6
E. 9
(Similar to this)


17. Given 5^(3)w + 5^(2)x + 5^(1)y + 5^(0)z = 264. If w, x, y and z are positive integers less than 5. What is the value of w + x + y + z?



A.4

B.6

C.8

D.10
E. 12



18.Given two integers ’R’ and ‘T’ between 650 and 690, if ten’s digit of ‘R’ is 8 and ten’s digit of ‘T’ is 6, then
Col A: Ten’s digit of R – T
Col B: 2





19.Given 9^x = 47. What is the nearest integer of 3^x?


A. 5

B. 7

C. 11

D. 12
& so on…………





20.In a hotel, the room numbers of a floor are numbered from 101 to 550. If particular rooms selected are of numbers that start with 1, 2, 3 and lasts with 4, 5, 6 then in how many ways the rooms can be selected?
(Similar to this)


21. The table shown gives the reading of a car at three stops ‘A’, ‘B’ and ‘C’ and if the car gets filled up to full tank at each stop, then find the ratio of number of miles travelled to number of liters used?
(Similar to this)


22.Given a set of numbers 2x, 3x and x^2. The arithmetic mean of the set is given some value (xxx). What is the range of ‘x’?


23.A computer system digit code has 5 digits. In that ‘x’ repeats once, ‘y’ repeats twice and ‘z’ repeats twice. If the system accepts this code: xyzyz and yyxzz. Then
Col A: The number of combinations possible for the system code
Col B: xxx (some value)
(Similar to this)


24. Given three numbers m, n and p. If L.C.M of ‘m’ and ‘n’ is ‘mn’ and L.C.M of ‘n’ and ‘p’ is ‘np’, then
Col A: L.C.M of ‘m’ and ‘p’
Col B: mp



25.Given three numbers 2x, 7x and x^2 (x < 0). If the average of three numbers is 12, find the greatest possible range of the three numbers?


26. A girl has ‘w’ kilograms of fodder to feed her dogs which lasts a week. If each dog eats ‘x’ kilograms of food twice each a day
Col A: Number of dogs
Col B: w/(7x)



27.There are two table ‘S’ and ‘T’ and having some number of coins on each of them, when 3 coins are taken from ‘S’ and put it on ‘T’, then they have same number of coins on each table. If 7 coins are taken from ‘T’ and put on ‘S’ then the number of coins on ‘T’ will be three times the number of coins on ‘S’. Then find the total number of coins on both ‘S’ and ‘T’?


28.Given that a set ‘N1’ has five different numbers and ‘N2’ has five different numbers and none of them have common numbers. If one number is selected from N1 and one number is selected from n2, then how many different combinations are possible?


29.In the pack of plates, 1/3 plates are damaged, 2/3 plates are cracked and 1/3 of them are damaged and cracked. If 80 are not hampered, then what is the number of total plates?
(Similar to this)


30.By what the number (28 )^3 is divisible?
A. 56
B. 58
& so on……………
(Similar to this)




31.There were 10 points marked on number line and all were on positive side. Out of 10 points, 3 points were labeled P, Q, R. All the 10 points were equidistant. The value of P and R were given in fraction, we have to find value of Q.

Note: Q is between 'P' and 'Q' but 'Q' was 4 points after 'P' and 5 points ahead of 'Q'. (Similar to this)


32.There were 10 points marked on number line and all were on positive side. Out of 10 points, 3 points were labeled P, Q, R. All the 10 points were equidistant. The value of P and R were given in fraction, we have to find value of Q.
Note: Q is between 'P' and 'Q' but 'Q' was 4 points after 'P' and 5 points ahead of 'Q'.
(Similar to this)



33.A crew of 12 members has to be seated around a dinning table. If the distance between each person to the other is 2.5ft, then what is the minimum length of the dinning table?

A. 10

B. 11

C. 12

D. 13
E. 14


34.If the length of Cuboid A is 40% of the length of Cuboid B, then
Col A: Volume of Cuboid A
Col B: Volume of Cuboid B


35.The average of 5 children age is 9. If one child is discarded from the group, the rest average age becomes 3. What is the age of discarded child?
(Similar to this


36.What is the value of ((5.29X602.1)/15.29)^1/2?


37.If three sides of a quadrilateral are equal and are of x cm, then find the perimeter of quadrilateral?

38.In a group, 7 out of every 15 students admitted in an university and one of them is absent everyday. If 315 students were admitted last month, then how many students were not absent at all? (Something similar to this)






39.Given x/y = 3/5.
Col A: x – 3
Col B: y – 5




40. There was a quadrilateral and a triangle they have one side common and length of all sides were given and we have to find the perimeter of quadrilateral?
(Similar to this


41. In a shop, the discounts are as follows. A 40% discount on each coat and 20% discount on each shirt. If a person buys 2 coats and 1 shirt, then what is the total discount he gets on buying?
(Similar to this


42. Given a train ‘P’ travelling a distance ‘s’ km at an average speed of x km/hr and another train ‘T’ travels a distance ‘z’ at a speed of y km/hr. If the time taken by train ‘P’ is less than the train ‘T’, find the equation which satisfies the above problem


43. Given that ‘P’ takes 4 hours to complete a work, ‘Q’ takes 6 hours to complete the same work and ‘R’ takes 8 hours to complete the same work. If three persons work together to complete the same work, what is the percentage work done by ‘P’?
(Similar to this)


44. . In an apartment 92% have cars and 14% have bikes and everyone in the apartment have either bike or a car.
Col A: Fraction of the people having car as well as bike
Col B: 1/10


45. Given (1/(x+y)) – 1 + (1/(x-y)) – 1 = 4. Which of the following must be true?
I. x = 2
II. y = 0
III. y = -1
A. Only I
B. Only II
C. Both I and III
& so on……….


46.Given a train ‘p’ travelling a distance ‘s’ km at an average speed of r km/hr and another train ‘t’ travels a distance ‘y’ at a speed of z km/hr. Find the equation which satisfies the above problem?

A.sr - yz > 0

B. sz - yr > 0

C. yz – sr > 0

D. ry.sz > 0

E. sy – rz > 0
(Something similar to this)



47.When ‘k’ is divided by 12 it gives remainder 5, what will be remainder when k^2 is divided by 8?



48.Given an equilateral triangle whose area is 4*root(3). On one side of the equilateral triangle rests the base of another triangle whose length is 3 and the other two sides of the triangle are 4 and 5. Find the perimeter of the polygon (5 sided) formed by the two triangles?


49.Given two sides of a rectangle as w+1 and w+3. The area of the rectangle is ‘x’. If the perimeter of this rectangle is equal to the perimeter of a square, then
Col A: x+1
Col B: Area of square




50. There are two rectangular solids large and small. If the edges of a small rectangular solid is 40% of the edges of a larger rectangular solid, then

Col A: Ratio of volume of smaller rectangular solid to larger rectangular solid
Col B: 8/125
(Similar to this)

[jess_84]

Any one please...........

[Articulate]

#4.
If the standard deviation is zero, it means that the numbers are same (no deviation). Then adding 10 and dividing with 7 will make each numbers change in the same way. So, the standard deviation will remain zero.

Thanks

[Articulate]

#35.
The total age is 9 X 5 =45
then one child is left out. Then total age 3 X 4 =12.
So, the Child (!) age equals 33 !

???

#33. I guess they are sitting on two sides of the table (as not enough info is provided) 6 on each side.
There are 5 gaps between 6 persons.
Therefore, 5 X 2.5= 12.5 =>the answer may be 13.

#41.
I guess the question is like what is the actual discount he gets?

He gets 40% in two items and 20% in one.
So, ((40 X 2)+ (20 X 1))/3 = 33.33%

[Md. Minuddin]

50. There are two rectangular solids large and small. If the edges of a small rectangular solid is 40% of the edges of a larger rectangular solid, then

Col A: Ratio of volume of smaller rectangular solid to larger rectangular solid
Col B: 8/125
(Similar to this)
Ratio will be 1/1.4*1.4*1.4 which is greater than 8/125
Hence A

[munimM]

any one please solve the tough problem