APTITUDE KNOWLEDGE NO:2

1)There are some bees in a garden.1/5th of them went to a particular flower,1/3rd went to another flower,3 times the difference of the above two went to third flower and one was remaining and it was roaming around. How many bees were there? (3 marks)

a)12 b)4 c)15 d)12

Ans:(c)

Explanation:

1/5 of the bees went to one place.

1/3 of the bees went to another place.

3 times difference went to third place=3((1/3)-(1/5))

=2/5

So 1/5 + 1/3 + 2/5 =14/15

Total no of bees went to search the flower was 14/15

One is remaning

So

14/15 + 1/x =1

1/x=1 - 14/15

X=15

Ans:=15

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2)A man drives with constant speed and after some time he sees a milestone with 2-digits and then he travels for an hr and sees the same 2 digits in reverse order and then after an hour he sees that the

milestone has the same 2 digits with a 0 between them.so whats the man speed?

a)45km/h b)35km/h c)20km/h

Ans:a)

Explanation:

Intially he see two digit xy

Then he see reverse order yx

Then he see 0 between x0y

Two digit no starting with 10 so

Xy yx x0y

10---> 10 01 100 xy-yx not equal to x0y-yx

11---> 11 11 101 xy-yx not equal to x0y-yx

12---> 12 21 102 xy-yx not equal to x0y-yx

13---> 13 31 103 xy-yx not equal to x0y-yx

14---> 14 41 104 xy-yx not equal to x0y-yx

15---> 15 51 105 xy-yx not equal to x0y-yx

16---> 16 61 106 xy-yx equal to x0y-yx à45

So the speed is 45km/h.Because when time=1 means speed=distance

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3)If 10 be added to 4 times a certain number, the result is 10 less than 5 times the number.what is the number?

a)15 b)20 c)25 d)30

Ans:(b)

Explanation:

10 + 4x = 5x - 10

X=20

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APTITUDE KNOWLEDGE NO:1

1)Out of 80 coins,one coin is counterfeit,what is the minimum number of weighing to find counterfeit coin?(Note:Counterfeit coin is lesser weight than fair coin)

a)5 or 7 b)5 or 6 c)6 or 7 d)8 or 6

Ans:(b)

Explanation:

count

First weighing 40 40 1

Second 20 20 2

Third 10 10 3

Fourth 5 5 4

Fifth 2 2 5 àTake four & weight it remaning one.

If the counterfeit coin is not present in the fifth step means weighing is equal.So the count is 5.

Otherwise

count

Sixth 1 1 6

Ans: 5 or 6

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2)In a row of 36 pupils,the first boy is followed by one girl,the second boy is folled by two girls,the third by 3 girls and so on like this.What is the number of girls in the second half of the row?

a)14 b)13 c)15 d)17

Ans:(c)

Explanation:

Total

Boy 1 1 1 1 1 1 1 1 =8

Girl 1 2 3 4 5 6 7 =28

Second half= 2+6+7=15

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3)John’s father will be twice his age 6 years from now.His mother was twice his age 2 years before.If john will be 24 from two years now.What is the difference between his fathers and mother’s age.

a)8 b)5 c)4 d)2

Ans:(a)

Explanation:

Father=F

Mother=M

F+6=2(J+6)---->(1)

M-2=2(J-2)--->(2)

J+2=24

J=22 ------------>(3)

Sub 3 in 1 and 2.Then we get

M=42

F=50

Difference is 8

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