1 .What is the average of first five multiples of 12?
a)36
b)38
c)40
d)42
2.if the average of the three consecutive even numbers is 34 find the largest of these numbers
a)30
b)32
c)34
d)36
3.The average age of 30 boys in a class is 15 years. If we include the age of two teachers the average age increases by 1. Find the sum of ages of two teachers.
a)55 years
b)58 years
c)62 years
d)64 years
4. The average age of the committee of 10 members is 40 years. A member of age 52 retires and a new member of age 38 takes his place. What is the average age of the present committee?
a)38.6 years
b)33.5 years
c)35.5 years
d)37.5 years
5. Four years ago, the average age of A and B was 20 years. If today average age of A,B and is 25 years, what will be age of C after 7 years?
a)32
b)34
c)36
d)38
6. Mohan get salary of RS. 6435, Rs.6855, Rs.7230 and Rs.6562 for 5 months. How much salary he must have in the sixth month so that he gets an average of Rs.6500?
a)4091
b)4991
c)3499
d)3344
7.The average weight of 8 women increase by 2.5 kg when a new women replaces one of them weight 60 kg. Find the weight of the new women
a)20
b)85
c)67
d)80
8.The average weight of 16 students in a class is 50.25kg, and that one of the remaining 8 students is 45.15 kg. Find the average weight of all the students in the class
a)34.56
b)56.53
c)48.55
d)31.44
9.In a class average age of 15 boys is 11. If 5 boys each of age 9 years are added, what would be the new average
a)20 years
b)10 years
c)10.5 years
d)23 years
10.The average weight of P, Q and R is 45kg. If the average weight of P and Q is 40 kg and that of Q and R is 43kg, what is the weight of Q?
a)32
b)65
c)67
d)31
11.find the average of first 20 consecutive natural numbers.
a)12.20
b)10.78
c)16.45
d)10.5
12. find the average of the square of first 5 consecutive numbers starting from 1 to 9, where the last odd number is 9.
a)22
b)16
c)11
d)33
13.10 typists can type 600 pages in 8 hours. Find the average number of pages typed by each typist in an hour.
a)7 pages
b)7.5 pages
c)8 pages
d)8.5 pages
14.the average of square of first 6 consecutive even number is:
a)12.20
b)60.66
c)16.45
d)178
15.the sum of three numbers is 98. If the ratio between first and second be 2:3 and between second and third be 5:8, then the second number is:
a)30
b)38
c)32
d)60