Question 1
The average of five consecutive integers is 16. What is the largest of these integers?
1
21
2
20
3
18
4
14
Question 2
The average of 10 numbers is 20. If one number is excluded, the average of the remaining numbers becomes 18. What is the excluded number?
1
200
2
25
3
42
4
38
Question 3
The average of four numbers is 40. If one number is replaced by 10, the new average becomes 36. What is the number that was replaced?
1
20
2
26
3
24
4
38
Question 4
The average of three numbers is 12. If two of the numbers are 8 and 10, what is the third number?
1
21
2
20
3
14
4
18
Question 5
In a class, the average age of 20 students is 18 years. The teacher’s age is added to the group, and the new average becomes 19 years. What is the age of the teacher?
1
39
2
25
3
30
4
38
Question 6
The average of five consecutive even numbers is 30. What is the smallest of these numbers?
1
24
2
20
3
14
4
26
Question 7
The average of 10 numbers is 35. If the first 9 numbers have an average of 30, what is the 10th number?
1
50
2
80
3
44
4
70
Question 8
The average of 10 numbers is 100. If one number is excluded, the average of the remaining numbers is 98. What is the excluded number?
1
120
2
110
3
100
4
118
Question 9
The average salary of employees in a company is 50,000. If there are 30 employees and the salary of the highest-paid employee is 100,000, what is the average salary of the remaining 29 employees?
1
49000
2
51000
3
48000
4
50000
Question 10
The average temperature for Wednesday, Thursday and Friday was 40°C. The average for Thursday, Friday and Saturday was 41° C. If temperature on Saturday was 42° C, what was the temperature on Wednesday?
1
30
2
38
3
40
4
39
Question 11
The average of the first five multiples of 9 is
1
20
2
14
3
21
4
27
Question 12
The speed of the train going from Nagpur to Allahabad is 100 km/h while when coming back from Allahabad to Nagpur, its speed is 150 km/h. find the average speed during whole journey.
1
120
2
125
3
100
4
150
Question 13
Find the average of first 97 natural numbers.
1
38
2
39
3
49
4
48
Question 14
The average age of three boys is 15 years. If their ages are in ratio 3 : 5 : 7, the age of the youngest boy is
1
9
2
16
3
18
4
12
Question 15
The average of a group of men is increased by 5 years when a person aged of 18 years is replaced by a new person of aged 38 years. How many men are there in the group?
1
20
2
8
3
5
4
4
Question 16
In a boat, there are 8 men. When one man weighing 60 kg is replaced by a new man, the average weight of the group increases by 1 kg. What is the weight of the new man?
1
70
2
68
3
67
4
69
Question 17
The average of 25 results is 18. The average of first 12 of those is 14 and the average of last 12 is 17. What is the 13th result?
1
78
2
74
3
70
4
69
Question 18
A train travels the first 16 km at a speed of 20 km / hour, the next 20 km at 40 km / hour and the final 10 km at 15 km / hour. What is the average speed for the entire journey?
1
≈ 26
2
≈ 20
3
≈ 21
4
≈ 23
Question 19
If the average of three numbers is 20 and two of them are 15 and 25, what is the third number?
1
18
2
20
3
25
4
30
Question 20
The average of five numbers is 30. If one number is 40, what is the average of the remaining four numbers?
1
27.5
2
28.5
3
25
4
29
Question 21
The average of 8 numbers is 15. If each number is increased by 5, what will be the new average?
1
18
2
10
3
20
4
25
Question 22
The average of three consecutive multiples of 5 is 25. What are the numbers?
1
25, 30, 35
2
30, 35, 40
3
20, 25, 30
4
15, 20, 25
Question 23
The average of 6 numbers is 12. If one more number is added and the average becomes 13, find the new number.
1
25
2
18
3
19
4
20
Question 24
The average of 20 results is 45. If the average of the first 10 is 40 and that of the last 9 is 50, find the 11th result.
1
60
2
50
3
40
4
55
Question 25
The average of 9 observations is 40. If one observation is wrongly noted as 56 instead of 36, what is the correct average?
1
40
2
38
3
39
4
37
Question 26
The average of 5 numbers is 10. If each number is multiplied by 3, the new average will be:
1
25
2
15
3
10
4
30
Question 27
The average marks of 50 students are 72. If the marks of one student are wrongly taken as 42 instead of 72, what is the correct average?
1
72.4
2
72.8
3
72
4
72.6
Question 28
A car travels 60 km at 40 km/h and returns at 60 km/h. Find its average speed.
1
55 km/h
2
52 km/h
3
50 km/h
4
48 km/h
Question 29
The average of 8 numbers is 25. If the sum of the first three numbers is 60, what is the average of the remaining five numbers?
1
28
2
30
3
29
4
27
Question 30
The average age of 5 members of a family is 25 years. A new member joins and the average becomes 24 years. What is the age of the new member?
1
21
2
18
3
19
4
20