1. If the price of petrol increases by 25%, by how much must a user cut down his consumption so that his expenditure on petrol remains constant?

A.25%

B.16.67%

C.20%

D.33.33%

Answer & Explanation

Answer:- 3

(X + Y +XY/100) = Net increase or decrease in expenditure

25 + (-Y) + (-25y/100) = 0

25 -Y -.25y = 0

25 -1.25y =0

25 = 1.25y

y = 25/1.25

y = 20

2. A sum Rs.731/- divided among A,B and C such that A receiver 25% more than B & B receive 25% less than C. What is C’s share amount?

(1) 217

(2) 320

(3) 272

(4) 306

(5) None of these

Answer & Explanation

Answer:- 3

Explanation:-

If C=100

then, B= 75

and A= 125% of B = 125% of 75.

Then A:B:C= (125/100)*75 : 75 : 100

Therefore A:B:C=375:300:400

C’s Share=(731/(375+300+400))*400

=(731/1075)*400

=272 Rs

3. Rs. 395 are divided among A,B and C in such a manner that B gets 25% more than A and 20% more than C. A’s share is Rs.__

(1) 105

(2) 110

(3) 115

(4) 120

(5) None of these

Answer & Explanation

Answer:- 4

Explanation:-

Let’s suppose A=100

Therfore B=125 and C=(125/120)*100

A:B:C=100:125:(125/120)*100

A:B:C=100:125:(125/6)*5

A:B:C=120:150:125

4. If the numerator of a fraction is increased by 150% & the denominator of fraction is increased by 300%, the resultant fraction is 5/18. What is the original fraction?

(1) 5/9

(2) 3/4

(3) 8/9

(4) 4/9

(5) None of these

Answer & Explanation

Answer:- 4

Explanation:-

Let Numerator be X

and Denominator be Y

Therefore (X+150% of X)/(Y+300% of Y)=5/18

250X/400Y=5/18

X/Y=(5*400)/(18* 250)

X/Y=4/9