11. The average of two numbers is 25. If one number is 20, what is the other number?
a) 30
b) 35
c) 40
d) 50
The correct answer is: A
12. The average score of a class of 50 students is 70. If the total score of 49 students is 3350, what is the score of the 50th student?
a) 150
b) 110
c) 120
d) 130
The correct answer is: A
13. The average of 10 numbers is 50. If one number is 40, what is the sum of the remaining 9 numbers?
a) 460
b) 470
c) 480
d) 490
The correct answer is: C
14. The average of 6 numbers is 15. If one of the numbers is 20, what is the average of the remaining numbers?
a) 12
b) 13
c) 14
d) 15
The correct answer is: B
15. The average of 5 numbers is 30. If the numbers are 20, 25, 35, and 40, what is the fifth number?
a) 30
b) 32
c) 35
d) 40
The correct answer is: A
16. The average of 7 numbers is 35. If one of the numbers is 60, what is the sum of the remaining 6 numbers?
a) 150
b) 185
c) 210
d) 220
The correct answer is: B
17. The average of 5 numbers is 25. If the sum of the first 4 numbers is 80, what is the fifth number?
a) 85
b) 90
c) 45
d) 100
The correct answer is: C
18. The average of 10 numbers is 55. If one of the numbers is 70, what is the average of the remaining numbers?
a) 52
b) 53
c) 54
d) 56
The correct answer is: B
19. The average of 4 numbers is 25. If one of the numbers is 15, what is the sum of the remaining 3 numbers?
a) 60
b) 70
c) 75
d) 85
The correct answer is: D
20. The average of 6 numbers is 18. If the sum of 5 of the numbers is 90, what is the sixth number?
a) 10
b) 12
c) 14
d) 16
The correct answer is: B
