Averages & ages aptitude

Question 1

The average of five consecutive odd numbers is 27. What is the largest of them?

Accepted Answer

31

Answer

29

Answer

33

Answer

35

Question 2

The average weight of 30 students is 45 kg. When the teacher's weight is included, the average rises by 0.5 kg. What is the teacher's weight?

Accepted Answer

60.5 kg

Answer

45.5 kg

Answer

60 kg

Answer

75.5 kg

Question 3

A batsman scores 85 runs in his 17th innings and thereby raises his average by 3. What is his average after the 17th innings?

Accepted Answer

37

Answer

34

Answer

40

Answer

38

Question 4

The average of 11 results is 50. The average of the first six is 49 and the average of the last six is 52. What is the sixth result?

Accepted Answer

56

Answer

52

Answer

50

Answer

54

Question 5

The present ages of A and B are in the ratio 4 : 3. After 6 years the ratio will be 11 : 9. What is A's present age?

Accepted Answer

16 years

Answer

12 years

Answer

20 years

Answer

24 years

Question 6

A father is three times as old as his son. Five years ago he was four times as old as his son. What is the father's present age?

Accepted Answer

45 years

Answer

40 years

Answer

48 years

Answer

42 years

Question 7

The sum of the ages of five children born at intervals of 3 years each is 60 years. What is the age of the youngest child?

Accepted Answer

6 years

Answer

4 years

Answer

8 years

Answer

9 years

Question 8

The average age of a class of 40 students is 15 years. Ten new students with an average age of 12 years join. What is the new average age?

Accepted Answer

14.4 years

Answer

13.5 years

Answer

14 years

Answer

14.5 years