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Practice Average Questions and Answers

The average age of a class of 20 girls is 14 years. If 5 new girls having average age of 9 years join the class, then the average age of the class becomes:
The average age of a class of 27 girls is 18 years. If 3 new girls having average age of 8 years join the class, then the average age of the class becomes:
The average age of a class of 17 girls is 12 years. If 3 new girls having average age of 8 years join the class, then the average age of the class becomes:
The average age of three children is 20 years. If their ages are in the ratio 2:3:5. Find the age of the youngest child.
The average age of three children is 21 years. If their ages are in the ratio 3:5:6. Find the age of the youngest child.
The average age of three children is 24 years. If their ages are in the ratio 5:6:7. Find the age of the youngest child.
The average age of three children is 25 years. If their ages are in the ratio 2:6:7. Find the age of the youngest child.
The average age of three children is 32 years. If their ages are in the ratio 3:6:7. Find the age of the youngest child.
The average of 9 numbers is 100. The average of the first 4 numbers is 65 and the average of the last 4 numbers is 40. What is the 5th number?
The average of 10 numbers is 102. The average of the first 5 numbers is 78 and the average of the last 4 numbers is 46. What is the 6th number?
The average of 12 numbers is 120. The average of the first 7 numbers is 75 and the average of the last 4 numbers is 53. What is the 8th number?
The average of 15 numbers is 110. The average of the first 7 numbers is 98 and the average of the last 7 numbers is 62. What is the 8th number?
The average age of 20 children and their teacher's age are 18 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?
The average age of 32 children and their teacher's age are 28 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?
The average age of 18 children and their teacher's age are 15 years. If the teacher's age is excluded, the average reduces by 2. What is the teacher's age?
The average age of 15 children and their teacher's age are 12 years. If the teacher's age is excluded, the average reduces by 2. What is the teacher's age?
A number is such that when it is multiplied by 3, it gives another number which is as much above from 240 as the original number (itself) is below 240. The...
A number is such that when it is multiplied by 4, it gives another number which is as much above from 180 as the original number (itself) is below 180. The...
A number is such that when it is multiplied by 5, it gives another number which is as much above from 210 as the original number (itself) is below 210. The...
A number is such that when it is multiplied by 5, it gives another number which is as much above from 270 as the original number (itself) is below 270. The...
A number is such that when it is multiplied by 6, it gives another number which is as much above from 210 as the original number (itself) is below 210. The...
The average age of A and B is 22 years. If A is to be replaced by C, the average would be 20 years. The average age of C and A is 23 years. Find the age of...
The average age of A and B is 15 years. If A is to be replaced by C, the average would be 14 years. The average age of C and A is 16 years. Find the age of...
The average age of A and B is 16 years. If A is to be replaced by C, the average would be 15 years. The average age of C and A is 17 years. Find the age of...
The average age of A and B is 19 years. If A is to be replaced by C, the average would be 18 years. The average age of C and A is 20 years. Find the age of...
The average age of A and B is 18 years. If A is to be replaced by C, the average would be 17 years. The average age of C and A is 19 years. Find the age of...
The average age of A and B is 17 years. If A is to be replaced by C, the average would be 16 years. The average age of C and A is 18 years. Find the age of...
The average age of A and B is 21 years. If A is to be replaced by C, the average would be 20 years. The average age of C and A is 22 years. Find the age of...
The average age of A and B is 22 years. If A is to be replaced by C, the average would be 21 years. The average age of C and A is 23 years. Find the age of...
The average cost of 3 chairs is Rs. 10000. The average cost decrease by 22% when one more chair is included. What is the cost price of the 4th chair?...
The average cost of 3 chairs is Rs. 8000. The average cost decrease by 20% when one more chair is included. What is the cost price of the 4th chair?...
The average cost of 3 chairs is Rs. 9500. The average cost decrease by 15% when one more chair is included. What is the cost price of the 4th chair?...
The average cost of 4 chairs is Rs. 11000. The average cost decrease by 15% when one more chair is included. What is the cost price of the 5th chair?...
The average cost of 5 chairs is Rs. 12000. The average cost decrease by 12% when one more chair is included. What is the cost price of the 6th chair?...
There are three numbers. If the average of any two of them is added to the third number, the sums obtained are 177, 163 and 138. Whatis the average of the ...
Average age of company A is 21 years and average age of both companies A and B is 13 years. If the ratio of number of employees in company A and B is 3:8, ...
Average age of company A is 21 years and average age of both companies A and B is 13 years. If the ratio of number of employees in company A and B is 3:8, ...
The average age of 32 children and their teacher's age are 28 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?
In an exam of 100 marks, the average marks of a class of 38 students are 72. If the top 3 scorers of the class leave, the average score falls “down b...
The average age of A and B is 22 years. If A is to be replaced by C, the average would be 21 years. The average age of C and A is 23 years. Find the age of...

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