In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.

aa _ aaa _ aaaa _ aaaa _ b

The series is aab / aaab / aaaab / aaaaab. Thus, the number of a`s is increasing by one in the successive sequence.

Atif is notified by a policeman from a distance of 200 m. The thief starts running and the police man chases him. The thief and the policeman run at the rate of 10 km and 11 km per hour respectively ,what is the distance between them after 6 minutes?

Relative speed of thief and policeman=(11-10)km/hr=1 km/hr.

Distance covered in 6 minutes=[(1/60)*6]km=(1/10)km=100m.

Distance between the thief and the policeman=(200-100)m=100m.

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The sum of Ages of 5 children born at the interval of 2 years each is 40 years. Find out the age of the youngest child?

let age of youngest child = x,

Then the age 5 children can be written as x, (x + 2 ), (x+4), ( x + 6 )and (x + 8).

Then,

x+ (x+ 2 )+ (x+ 4)+ (x+ 6 )+ (x+ 8 )= 40

5x=40 - 20

x=20 / 5

x =4

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Bombay Express left Delhi from Bombay at 14.30 hours, travelling at a speed of 60 km per hour and Rajdhani Express left. Delhi from Bombay on the same day at 16.30 hours, travelling at the speed of 80 kilometre per hour. How far away from Delhi will the two trains meet?

Suppose they meet x hours after 14.30 hours.

Then 60 x =80 (x-2) or x=8

Required distance=(60*8)km

=480 km.

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Jimmy bought 60 Mangoes and 40 Apples. He found 30% of Mangoes and 10% of apples were overripe. Find the number of fruit in good condition.

Total fruit = 60 + 40 = 100

Overripe Mangoes = 30% of 60

= 30/100 x 60

=18

Overripe Apples = 10% of 40

= 10/100 x 40

=4

Total number of overripe fruit= 18+4=22

Therefore Number of fruit in good condition= 100-22= 78

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In Math test out of 10 marks for students got 4 marks and 6 got 5 marks what will be the average marks of class:

={( number of student X marks)+( number of student X marks)}/ total students

={( 4 x 10)+(6Ã—5)}/6+4

=(40+30)/10

= 7 is the average marks of class.

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