Aptitude

Aptitude Questions and Answers

1

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

a

25

b

35

c

45

d

55

correct answer b

(27*5)-(25*4)

135-100

35

2

The average temperature for Wednesday, Thursday and Friday was 40oC. The average for Thursday, Friday and Saturday was 41oC. If temperature on Saturday was 42oC, what was the temperature on Wednesday?

a

39 degree celsius

b

44 degree celsius

c

38 degree celsius

d

41 degree celsius

correct answer a

Average temperature for Wednesday, Thursday and Friday = 40oC
Total temperature = 3*40 = 120oC
Average temperature for Thursday, Friday and Saturday = 41oC
Total temperature = 41*3 = 123oC
Temperature on Saturday = 42oC
Now,
(Thursday + Friday + Saturday) - (Wednesday + Thursday + Friday) = 123-120;
Saturday - Wednesday = 3
Wednesday = 42-3 = 39oC.

3

Three numbers are in the ratio 4 : 5 : 6 and their average is 25. The largest number is :

a

30

b

40

c

50

d

60

correct answer a

Let the numbers be 4x, 5x and 6x.

Then, `(4x + 5x + 6x ) / 3 = 25`  

=> 5x = 25

=> x = 5.

Largest number  6x = 30.

4

The avergae of weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg.What might be the weight of new person?

a

76 kg

b

76.5 kg

c

85 kg

d

None of these

correct answer c

Let Average of the 7 people who are same be 'X'

The person who is replaced is of 65kg.

Then, given problem is:

`('X' + 65)/8 + 2.5 = ('X' + 'New Person')/8`

`('X' + 85)/8 =  ('X' + 'New Person')/8`

Therefore, 'New Person' = 85;

5

The captain of a cricket team of 11 players is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded the average age of remaining players is one year less than the average age whole team. What is the average age of the team?

a

23 Years

b

24 Years

c

25 Years

d

None of these

correct answer a

Let the average age of the team is x years.

11x - (26+29) = 9(x-1)

x = 23

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