1.  The average of 5 numbers is 100. If each number is multiplied by 2, then find the average of new numbers. 
a.   200 
b.   400 
c.   250 
d.   500




2.  The average age of 25 students in a class is 8years. If the teacher's age is also included the average age becomes 9 years. Find the teacher's age. 
a.   35 years 
b.   34 years 
c.   33 years 
d.   32 years




3.  Find the average of consecutive odd numbers 23, 25, 27, 29, 31, 33 and 35. 
a.   28 
b.   27 
c.   31 
d.   29




4.  Find the average of first 41 consecutive even numbers. 
a.   41 
b.   42 
c.   20 
d.   21




5.  A person covers 8miles at a speed of 2 mile/hr, 12miles at the speed of 3 mile/hr and 15 miles with the speed of 5 mile/hr. Find the average speed during the entire journey. 
a.   35/11mile/hr. 
b.   25/11mile/hr. 
c.   7/11mile/hr. 
d.   15/11mile/hr.




6.  Find the average of all the prime numbers lying between 10 and 20. 
a.   18 
b.   19 
c.   12 
d.   15




7.  Find the average of all the prime numbers lying between 20 and 40. 
a.   10 
b.   15 
c.   20 
d.   30




8.  Find the average of all prime numbers between 1 and 30. 
a.   20 
b.   11.8 
c.   12 
d.   12.5




9.  The average of 6 consecutive even numbers is 45. Find the largest of these numbers. 
a.   40 
b.   70 
c.   50 
d.   35




10.  The average of 9 consecutive numbers is 40. Find the largest of these numbers. 
a.   22 
b.   32 
c.   44 
d.   56




11.  The average age of 30 students in a class is 12 years. The average age of 18 students is 10. What is the average age of the remaining 12 students? 
a.   10 
b.   15 
c.   12 
d.   18




12.  The average of 60 numbers is 40. If four numbers, 10, 20, 30 and 40 are discarded, then the average of the remaining numbers is nearly: 
a.   41.07 
b.   30.05 
c.   40 
d.   100



