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# Aptitude preparation

## Aptitude on average

### Aptitude questions and answers on average

1. Find the Average of first  50 naturals numbers ?
 A. 20 B. 25.5 C. 20.25 D. 22.67
2. Find the Average of prime numbers  between 10 to 20 ?
 A. 25 B. 20 C. 15 D. None
3. What is the Average of first five  multiple of 2 ?
 A. 4 B. 6 C. 8 D. None
4. There are 40 students in aclass. The average age of 10 students is 15 years.The average age of next 30 students is 12.5  years.What is the average age of whole class ?
 A. 13.1 B. 15.2 C. No answer D. None
5. 20 pens and 55 pencils were purchased for Rs.600.If the average price of a pencil was Rs.2 , find the average price of a pen ?
 A. 22 B. 25 C. 26.3 D. 24.5
6. If the number of quantities is 12 and their sum is 540, then their average is ?
 A. 50 B. 45 C. 55 D. 40
7. If the number of quantities is 10 and their average is 56 .Find the sum of quantities ?
 A. 545 B. 475 C. 560 D. None
8. The average  of  6 quantities is 10 , the average  of  3 of them is 8. Find the average of remaining  quantities ?
 A. 18 B. 20 C. 15 D. None
9. If the  average is 35, and their sum is 700 then find the number of quantities ?
 A. 25 B. 20 C. 17 D. None of these
10. To find the geometic mean (GM) of 2 , 3 , 4 and 5 ?
 A. 25 B. 30 C. 35 D. None of these
11. If the marks obtained by Rajesh in maths, science and social are 67 , 72 and 80 respectively ,then his average score is ?
 A. 73 B. 75 C. 65 D. 69
12. A man walks 2500 metres in 40 minutes , 1000 metres in 30 minutes and 500 metres in 10 minutes. Then what is the average speed for whole walking distance ?
 A. 65 B. 50 C. 65 D. None
13. The average of 35 numbers is zero.Of them, at the most ,how many may be greater than zero ?
 A. 30 B. 19 C. 34 D. 35
14. Find the average of all the numbers between 5 to 25 , which are divisible by 3 ?
 A. 18 B. 19 C. 15 D. 17
15. Find the arithmetic mean of  3 , 5 , 7 , 8 , 13 , 17 ,22  and  x. Mean is 10 ,what should be the number in place of x ?
 A. 5 B. 10 C. 7 D. 3
16. If the average  of 4 observations  x, x+2 , x+4 , x+6  is 20  , find the average of last two observations ?
 A. 22 B. 17 C. 9 D. None
17. Suresh average daily expenditure is Rs.16 during march ,  Rs.12 during april ,  Rs.22 during may.What is the average  daily expenditure for the three months ?
 A. Rs.18 approx B. Rs.14.5 approx C. Rs.17 approx D. None of these
18. Find the average of squares of consecutive odd numbers till  9 ?
 A. 25 B. 30 C. 33 D. 30
19. Find the average of squares of consecutive even numbers till  13?
 A. 70 B. 65 C. 60 D. 55
20. What would be  the average of cubes of consecutive 15 natural numbers ?
 A. 1000 B. 860 C. 940 D. 960
21. Find the average of consecutive 25 natural numbers ?
 A. 16 B. 12 C. 13 D. None
22. What is the  average of square of consecutive 5  natural numbers ?
 A. 11 B. 12 C. 10 D. 14
23. Find the  average of cubes of consecutive 10 natural numbers ?
 A. 3000 B. 3025 C. 2954 D. 3252
24. What would be  the  average of 22 consecutive even numbers ?
 A. 30 B. 25 C. 23 D. None
25. The average of 6 numbers is 32, if one number is exclude the average becomes 27. what is the exclude number  ?
 A. 47 B. 62 C. 57 D. None
26. The average marks of 11 students is 54, the first five students is 20 and that of the last five students is 28. Find the value of 6th  number ?
 A. 345 B. 354 C. 372 D. None of these
27. Anil travels to a place 200 km away at an average speed of 70 km/hr and returns at 32 km/hr. Find the average speed for whole journey in km/hr ?
 A. 42 B. 43 C. 43.92 D. 25
28. If a cyclist cycles a distance at the speed of 15 km/hr and comes back at a speed of 35 km/hr, then find his average speed ?
 A. 25 B. 21 C. 30 D. 18
29. Find the sum of consecutive odd number in a group  1 to 60 ?
 A. 900 B. 850 C. 800 D. 950
30. If the average weight of 6 men increases by 4 kg when one of them weighing 80 kg is replaced by another man. Then  find weight of the new man ?
 A. 100 B. 105 C. 104 D. 110
31. If the average weight of 15 men is 60kg,and that of 20 women is 50kg,Then find the average weight of 35 persons ?
 A. 54 B. 54  2/7 C. 56  3/4 D. None of these
32. The average of 13 results is 68.The average of first seven is 63 and that of last seven  is 70.Then find  the seventh result ?

 A. 47 B. 48 C. 46 D. 50
33. What fraction must be subtracted from the sum of 1/2 and 1/6 so that the average of the three may become 1/15 ?
 A. 3/4 B. 2/5 C. 1/5 D. None
34. Find the average of consecutive natural numbers from 20 to 80 ?
 A. 45 B. 55 C. 50 D. None
35. Find the average of consecutive even  numbers to 80 ?
 A. 41 B. 40 C. 43 D. None
36. The average temperature of first four days of a week is 38°C and the average temperature of last four days is 45°C but the average  temperature of that week is 42°C,Find  the temperature of the fourth day of that week ?
 A. 42°C B. 38°C C. 43°C D. 32°C
37. The average score of cricketer in 4 matches is 30 and in 8 others in 15.Then find his average score in 6 matches ?
 A. 20 B. 25 C. 24 D. 30
38. What is the average of 10 , 20 , 30 , 40 ,50 ?
 A. 30 B. 25 C. 32 D. None
39. The average salary of 25 workers in an office is Rs.3000 per month.If the manager's salary is added,the average salary becomes Rs.3200 p.m.What is the manager's salary ?
 A. 8000 B. 8200 C. 7890 D. 8100
40. Find the mean of 2 ,3 , 4 ,5 ,6 ?
 A. 4 B. 3 C. 5 D. None