A + B means A is the son of B;

A - B means A is the wife of B;

A x B means A is the brother of B;

A Ã· B means A the mother of B; and

A = b means A is the sister of B.

What does P = R + Q means?

P = R + Q means P is the sister of R who is the son of Q I.e. P is the daughter of Q.

So, the answer is (b).

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The ratio of two brothers John and Harry is 4 / 5. However if the age of John before 10 years and that of Harry after 10 years then the original ratio is reversed. What is the age of John?

John age is = a and harry= b

given that a /b = 5 / 4

4a= 5 b

4a - 5b= 0.... Equation 1

and also given that a - 10 / b + 10 = 4 / 5

5 a- 50 = 4 b + 40

5a - 4 b = 90.... Equation 2

by solving both equation

a = 50

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All the six members 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. How many male members are there in the family?

Option: (D)

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. A is the mother and hence female. B is the son and hence male. C is the husband and hence male. D is the daughter and hence female. E is the brother and hence male. F is the son and hence male. So , there are four males.

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Look at this series: 2, 6, 18, 54, ...

What number should come next?

What number should come next?

This is a simple multiplication series.

Each number is 3 times more than the previous number.

The series is 2, 6, 18, 54, . . .

Rule = (1st number x 3 = 2nd number), (2nd number x 3 = 3rd number)....

Now

(2), (2 x 3 = 6), (6 x 3 = 18), (18 x 3 = 54), (54 x 3 = 162)...

So the answer is 162..

P is the brother of Q and R. S is R's
mother. T is P's father. Which of the following statements cannot be definitely
true ?

Option (D)

P, Q, R are children of same parents. So, S who is R's mother and T, who is P's father will be mother and father of all three. However, it is not mentioned whether Q is male or female. So, (d) cannot be definitely true.

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