Average 1
1. Average of 11 consecutive natural number is 75 find the greatest number?
A.80
B.85
C.90
D.96
2. If average of 14 consecutive even numbers is 107. Then, find the smallest number?
A.93
B.92
C.94
D.89
3. If average of 6 consecutive numbers is 48, what is the difference between the smallest and the largest
numbers?
A.10
B.9
C.5
D. data inadequate
4. Out of four numbers, the average of the first three is 16 and that of the last three is 15. If the last number
is 21 then the first number is:
A.22
B.24
C.21
D.28
5. The average of eleven consecutive positive integers is d. If the last two numbers are excluded, by how
much will the average increase or decrease?
A. Will increase by 1
C. Will decrease by 1
B. Will increase by 2
D. Will decrease by 2
6. The mean of a group of eleven consecutive natural numbers is m. What will be the percentage change in
the mean when next six consecutive natural numbers are included in the group?
A. m%
B.
𝑚
%
3
C.
𝑚
%
300
D.
300
%
𝑚
1
7. Average age of 50 men 25 years. It is increased by 7 year when a man went home .what is the age of that
man?
A.17
B.18
C.19
D.20
1
8. Average age of 20 men is increased by 5 years when one of them whose age is 26 years is replaced by a
new man.what is the age of the new man?
A.25 y
B.30 y
C.35 y
D.44 y
9. The average of four consecutive even numbers is 27. Find the largest of these numbers?
A.32
B.30
C.28
D.34
10. The Sum of three consecutive even numbers is 52 more than their average. What will be the first of
these numbers?
A.14
B.24
C.34
D.44
11. The average of 13 results is 68. The average of first seven is 63 and that of the last seven is 70, the
seventh result is:
A.89
B.65.5
C.73.5
D.47
12. The average of first five multiples of 3 is?
A.15
B.12
C.3
D. 9
13. The average of the two-digit numbers, which remain the same when the digits interchange their
positions, is?
A.55
B.33
C.44
D.66
14. The average of a non-zero number and its square is 5 times the number. The number is?
A.9
B. 17
c. 29
d.295
15. The average of five consecutive odd numbers is 61. What is the difference between the highest and
lowest numbers?
A.9
B. 8
C.10
D. 11
16. A library has an average of 510 visitors on Sundays and 240 on other days. The average number of
visitors per day in a month of 30 days beginning with a Sunday is?
A.276
B.280 C.285
D. 250
17. If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55 and 60, then the
average marks of all the students is?
A. 53.33
B. 54.68
C. 55
D. none
18. The average weight of 16 boys in a class is 50.25 kg. and that of the remaining 8 boys is 45.15 kg.
Find the average weight of all the boys in the class?
A.48.55
B.49.25
C.45
D. 47
19. The average of six numbers is z and the average of three of these is y. If the average of the remaining
three is w, then?
A. 2z = 2y + 2w
B. z = 2y + 2w
C. z = y + w
D. 2z = y + w
20. Out of 9 persons, 8 persons spent Rs. 30 each for their meals. The ninth one spent Rs. 20 more than
the average expenditure of all the nine. The total money spent by all of them was?
A.290
B. 260 C. 292.50
D. 400.50
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