A 1000 m long train crosses a platform 100 seconds while it crosses a single pole in 20 seconds. What is the length of platforms?

Speed=1000/20

Speed=500m/s

Let the length of platform be x metres

Then,(x+1000)/100=500

X+1000=500*100

X+1000=50000

X=50000-1000

X=4900 m

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In following question, a number series is given with one term missing. Choose correct alternative

1, 2, 3, 6, 9, 18, x , 54

1, 2, 3, 6, 9, 18, x , 54

The numbers are alternatively multiplied by 2 and 3/2.

So, 1 X 2 = 2, 2 X 3/2 = 3,

3 X 2 = 6, 6 X 3/2 = 9,

so missing number = 18 X 3/2 = 27.

Price of perfumes is giving in discounted price with 30% but after a month price increases 30% again now what will the new price of perfumes?

Let price of perfume is 100.

Discount 30% =70

Increased 30% in discounted price.

= 30 of 70

= 30 / 100 Ã— 70

= 21

New price will = 70 + 21 = 91.

So, 91% is the correct answer.

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In following questions, three sequence of alphabets/numerals are provided which correspond to each other in some way. Find out alphabets/numerals that come in the blank places. Choose the correct option

_ A C _ B D _ C D C D 2 _ 4 1 _ 1 4 _ _ _ _ c d _ b c _ a ? ? ? ?

Clearly, 4 corresponds to C and a corresponds to 4.

So, a corresponds to C.

1 corresponds to D and b corresponds to 1.

So, b corresponds to D.

Thus, CDCD corresponds to a, b, a, b.

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A is the father of C.But C is not his son.

E is the daughter of C.F is the spouse of A.

B is the brother C.D is the of B.

G is the spouse of B.H is the father of G.

Who is the son of F?

B is the son of A and F is the spouse of A. So, B is the son of F..

All the 6 member of a family A .B .C .D .E and F are travelling together. B is the son of C but C is not the mother of B ,A and C are a married couple. E is the brother of C. D is the daughter of A. F is the brother of B.

Who is the mother of B?

B is the son of C but C is not the mother of B means C is the father of B. A is married to C means A is the mother of B. F is brother of B means F is son of A and C. D is daughter of A means D is daughter A and C. Clearly, A is the mother of B..

The present ages of three Ladies are in proportion 4:7:9. Eight years ago, the sum of their ages eight years ago(in years).

Let their present ages be 4x,7x and 9x years respectively.

Then,(4x-8)+(7x-8)+(9x-8)=76

20x=100

x=5

Their present ages are 12 years ,27 years and 37 years respectively.

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** **A
family consists of six members P, Q, R, X, Y and Z. Q is the son of R but R is
not mother of Q. P and R are a married couple. Y is the brother of R. X is the
daughter of P. Z is the brother of P. How is Q related to X ?

Option (C)

Q is the son of R but R is not the mother. So, R is the father of Q. P is married to R. So, P is the wife of R and the mother of Q. X is the daughter of P and hence of R and so she is the sister of Q. Y is the brother of R and Z is the brother of P. X is the sister of Q who is a male. So, Q is brother of X.

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