QUANTITATIVE APTITUDE
IMPORTANT QUESTIONS
- NUMBER SYSTEM
- AVERAGE
- PERCENTAGE
- PROFIT AND LOSS
- S.I AND C.I
- RATIO AND PROPORTION
- MIXTURE AND ALLIGATION
- DISTANCE ,SPEED AND TIME
- TIME AND WORK
- LINEAR EQUATION
- QUADRATIC EQUATION
- LOGARITHM
- INEQUALITIES
- FUNCTIONS AND GRAPHS
- SURDS AND INDICES
- GEOMETRY
- P AND C
- PROBABILITY
- SET THEORY
IMPORTANT QUESTION FROM AVERAGE
The average of the number of students in three colleges S, T and U is 845. The number of Students in college S and U is 75 and 81 more than the number of students in college T. Find the number of students in college T. find the number of students in college T.
A) 845
B) 793
C) 814
D) 781
E) 823
A) 845
B) 793
C) 814
D) 781
E) 823
The average age of Rahul, Vikas and Sagar, 4 years ago was 42 years and that of Rahul and Sagar, 7 years ago was 32 years. Find the present age of Vikas.
A) 56 years
B) 58 years
C) 60 years
D) 62 years
E) 64 years
A) 56 years
B) 58 years
C) 60 years
D) 62 years
E) 64 years
4 boys appear for a test. The average of the score of the first three boys is 72 while that of last three boys is 79. If the last boy scores 96 marks, find the score of the first boy.
A) 72
B) 74
C) 87
D) 42
E) 75
A) 72
B) 74
C) 87
D) 42
E) 75
Consider a sequence of seven consecutive integers. The average of first five integers is N. The average of all the seven integers is
A) N
B) N + 1
C) K x n, where k is a function of n
D) N + 2/7
A) N
B) N + 1
C) K x n, where k is a function of n
D) N + 2/7
There's a lot of work in preparing a birthday dinner. Even after the turkey is in oven, there are still the potatoes and gravy, yams, salad, and cranberries, not to mention setting the table. Three friends, Asit, Arnold, and Afzal, work together to get all of these chores done. The time it takes them to do the work together is six hours less than Asit would have taken working alone, one hour less than Arnold would have taken, and half the time Afzal would have taken working alone. How long did it take them to do these chores working together?
A) 20 minutes
B) 30 minutes
C)40 minutes
D) 50 minutes
A) 20 minutes
B) 30 minutes
C)40 minutes
D) 50 minutes
Three Math classes; X, Y, and Z take an algebra test.
The average score in class X is 83.
The average score in class Y is 76.
The average score in class Z is 85.
The average score of all students in class X and Y together is 79.
The average score of all students in classes Y and Z together is 81.
What is the average of all the three classes?
A) 81
B) 82
C) 81.5
D) 84.5
The average score in class X is 83.
The average score in class Y is 76.
The average score in class Z is 85.
The average score of all students in class X and Y together is 79.
The average score of all students in classes Y and Z together is 81.
What is the average of all the three classes?
A) 81
B) 82
C) 81.5
D) 84.5
A set of consecutive positive integers beginning with 1 is written on the blackboard. A student came along and erased one number. The average of the remaining numbers is 35\( \frac{7}{17} \). What was the number erased?
A) 7
B) 8
C) 9
D) None of these
A) 7
B) 8
C) 9
D) None of these
Amol was asked to calculate the arithmetic mean of 10 positive integers, each of which has 2 digits. By mistake, he interchanged the 2 digits, say a and b, in one of these 10 integers. As a result, his answer for the arithmetic mean was 1.8 more than what it should have been. Then b – a equals
A) 1
B) 2
C) 3
D) None of these
A) 1
B) 2
C) 3
D) None of these
The average height of 22 toddlers increases by 2 inches when two of them leave this group. If the average height of these two toddlers is one-third the average height of the original 22. Then the average height, in inches, of the remaining 20 toddlers is.
A) 30
B) 28
C) 32
D) 26
A) 30
B) 28
C) 32
D) 26
First 10 multiples of 1, 2…, and 10 are taken. What is the average of all these 100 numbers?
A) 25.5
B) 50.5
C) 75.5
D) None of these
A) 25.5
B) 50.5
C) 75.5
D) None of these
The average of 38, 84, 63, 45, 32 and n lies between 50 and 60. If n is an integer greater than the average of the numbers, then n lies between
A) 53 < n < 97
B) 50 < n < 100
C) 52 < n < 98
D) None of these
A) 53 < n < 97
B) 50 < n < 100
C) 52 < n < 98
D) None of these