68
Q:

The third proportional tox2-y2 and x-y is :

A) (x + y ) B) (x - y)
C) (x + y) / ( x - y) D) (x -y) / ( x + y)

Answer:   D) (x -y) / ( x + y)



Explanation:

Let the third proportional to x2-y2 and x-y be z. Then, 

 

x2-y2:x-y::x-y:z  

 

=>x2-y2*z=x-y2  

 

=> z=x-y2x2-y2=x-yx+y

Q:

If the ratio between the profit and sale price of an article is 1:5, then the ratio between the sale price and the cost price of that article is

 

A) 3:2 B) 4:3
C) 5:4 D) 6:5
 
Answer & Explanation Answer: C) 5:4

Explanation:
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0 181
Q:

An office opens at 10 AM and closes at 5 PM. The lunch interval is 30 minutes. The ratio of lunch interval to the total period of office ours is

A) 1:7 B) 1:14
C) 7:1 D) 14:1
 
Answer & Explanation Answer: B) 1:14

Explanation:
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2 118
Q:

A sum of Rs. x was divided between A, B, C, and D in the ratio 1/3 : 1/5 : 1/6 : 1/9. If the difference between the shares of B and D is Rs. 832, then the value of x is:

 

A) 7,592 B) 7,384
C) 7,696 D) 7,488
 
Answer & Explanation Answer: A) 7,592

Explanation:
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5 874
Q:

If A : B = 3 : 5, and B : C = 2 : 3, then A : B : C is equal to:

 

A) 3 : 8 : 6   B) 3 : 7 : 3  
C) 6 : 10 : 15   D) 6 : 15 : 10  
 
Answer & Explanation Answer: C) 6 : 10 : 15  

Explanation:
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1 4113
Q:

A certain amount is divided among Sunita, Amit and Vibha in the ratio of 2 : 3 : 4. If Vibha gets Rs. 14,416, then the total amount is:

 

 

A) ₹16,219 B) ₹3,604
C) ₹43,248 D) ₹32,436
 
Answer & Explanation Answer: D) ₹32,436

Explanation:
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2 541
Q:

If angles of a triangle are in the ratio of 2 : 3 : 4, then the measure of the smallest angleis:

 

A) 50o B) 30o
C) 40o D) 20o
 
Answer & Explanation Answer: C) 40o

Explanation:
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1 3051
Q:

If 350 marbles are shared between Sita and Savita in the ratio 5 : 9, Savita will get ............... marbles.

 

A) 200 B) 250
C) 225 D) 125
 
Answer & Explanation Answer: C) 225

Explanation:
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2 2982
Q:

In wallet, there are notes of the denominations Rs. 10 and Rs. 50. The total number of notes is 12. The number of  Rs. 10 and  Rs. 50 notes are in the ratio of 1 : 2. Total money in the wallet is:

 

A) ₹ 360 B) ₹ 280
C) ₹ 110 D) ₹ 440
 
Answer & Explanation Answer: D) ₹ 440

Explanation:
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3 517