**411. The average of 35 students in a class is 16 years. The average age of 21 students is 14. What is the average age of remaining 14 students?**

A. 15 years

B. 17 years

C. 18 years**D. 19 years**

**412. The average of five numbers is 27. If one number is excluded, the average becomes 25. The excluded number is__________?**

A. 25

B. 27

C. 30**D. 35**

**413. A library has an average of 510 visitors on Sunday and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is___________?**

A. 250

B. 276

C. 280**D. 285**

**414. A family consists of grandparents, parents and three grandchildren. The average age of the grandparents is 67 years, that of the parents is 35 years and that of the grandchildren is 6 years. What is the average age of the family?**

A. 28 4/7 years**B. 31 5/7 years**

C. 32 1/7 years

D. None of these

**415. The average of five consecutive odd numbers is 61. What is the difference between the highest and lowest numbers?**

A. 2

B. 5**C. 8**

D. Cannot be determined

**416. The average of non-zero number and its square is 5 times the number. The number is__________?****A. 9**

B. 17

C. 29

D. 295

**417. The average of the two-digit numbers, which remain the same when the digits interchange their positions, is__________?**

A. 33

B. 44**C. 55**

D. 66

**418. The average of first five multiples of 3 is____________?**

A. 3**B. 9**

C. 12

D. 15

**419. Find the average of all the numbers between 6 and 34 which are divisible by 5.**

A. 18**B. 20**

C. 24

D. 30

**420. The average of runs of a cricket player of 10 innings was 32. How many runs must he make in his next innings so as to increase his average of runs by 4?**

A. 2

B. 4

C. 70**D. 76**