The ratio of Two Sisters Alice and Betty is 3/2. However if the age of Alice before 15 years and that of Betty after 15 years than the original ratio is reserved. What is the age of Betty?

Let

Alice age's= A and Betty Age's=B

Given that

A / b = 3 / 2

2 A= 3 B

2A-3B=0.......(1)

And also given that

(A -15 )/ (B+ 15 )= 2 / 3

3 A- 45 =2B-30

3A - 2B = 75..... (2)

By solving both equation

B=30

So Batty is 30 years old

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If a boat travels at a speed of 20 km per hour in stillwater. Now if it's travelling in downstream speed of 10 km per hour and travel 70 kilometre. What is the time taken by it?

Time= distance /speed

Sister boat is travelling in a downstream the speed of the stream adds up in the speed of boat so its speed=boat speed+downstream speed. which becomes 20+10=30 km/hr. Now applying the formula we get

Time=70/30 we get our answer which is 2.3

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In following questions, one term in number series is incorrect.

Find out the incorrect number 5, 27, 61, 122, 213, 340, 509

Find out the incorrect number 5, 27, 61, 122, 213, 340, 509

The correct sequence is 2

So, 27 is wrong and should be replaced by 3

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. Which of the following is a pair of females?

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. Clearly, the females are only the mother A and the daughter D.

A + B means A is the father 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 is the daughter of B.

If P + Q which of the following is true?

P + RÃ·Q means P is the father of R who is the daughter of Q i.e P is the father of R and Q is the mother of it is the husband of Q..

A test has 20 questions. If Anna gets 90% correct, how many questions did Anna missed?

The number of correct answers is 90% of 20 or 90/100 x 20

90/100 x 20 = 18

Since the test has 20 questions and she got 18 correct answers, the number of questions she missed is 20-18=2

Anna missed 2 question.

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