In following number series, either one term is missing or is incorrect. Choose correct answer from options

Choose correct answer from options 1, 2, 5, 10, 17, 28

Choose correct answer from options 1, 2, 5, 10, 17, 28

The correct sequence is + 1, + 3, + 5, + 7, + 9.

So, 28 is wrong and must be replaced by (17 + 9) i.e. 26..

The present age of three persons are in proportion 4:7:9. Eight years ago the sum of their ages is 76. Find their present ages?(in years)

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

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

20x=100

x=100/20

x=5

There present ages be 20,35,45 years respectively.

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A, B, C, D and E play a game of cards. A says to B, "If you give me 3 cards, you will have as many as I have at this moment while if D takes 5 cards from you, he will have as many as E has." A and C together have twice as many cards as E has. B and D together also have the same number of cards as A and C taken together. If together they have 150 cards, how many cards has C got ?

Clearly, we have :

A = B - 3 ...(i)

D + 5 = E ...(ii)

A+C = 2E ...(iii)

B + D = A+C = 2E ...(iv)

A+B + C + D + E=150 ...(v)

From (iii), (iv) and (v), we get: 5E = 150 or E = 30.

Putting E = 30 in (ii), we get: D = 25.

Putting E = 30 and D = 25 in (iv), we get: B = 35.

Putting B = 35 in (i), we get: A = 32.

Putting A = 32 and E = 30 in (iii), we get: C = 28.

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Pointing out to a photograph, a man tell his friend, "She is the daughter of the only son of my father's wife".

How is the girl in the photograph related to the man?

The relations may be analysed as follows:

father's wife-- mother;

mother's only son-- himself.

so, the girl is man's daughter.

hence, the answer is (a).

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

9 , 12 , 11 , 14 , 13 , x , 15

9 , 12 , 11 , 14 , 13 , x , 15

Alternately we add 3 and subtract 1. Thus,

9 + 3 = 12, 12 - 1 = 11, 11 + 3 = 14

and so on. Missing number = 13 + 3 = 16..

A and B are married couple. X and Y are brothers. X is the brother of A.

How is Y related to B?

Option (A)

A and B are husband and wife. Since X and Y are brothers, and X is the brother of A, Y is also the brother of A.

Thus, Y is the brother-in-law of B.

Hence, the answer is (a).

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