9
Q:

A man could buy a certain number of notebooks for Rs.300. If each notebook cost is Rs.5 more, he could have bought 10 notebooks less for the same amount. Find the price of each notebook ?

A) 15 B) 20
C) 10 D) 8

Answer:   C) 10



Explanation:

Let the price of each note book be Rs.x.

Let the number of note books which can be brought for Rs.300 each at a price of Rs.x be y.

Hence xy = 300

=> y = 300/x

(x + 5)(y - 10) = 300 => xy + 5y - 10x - 50 = xy

=>5(300/x) - 10x - 50 = 0 => -150+x2+5x

multiplying both sides by -1/10x

=> x2+15x-10x-150=0

=> x(x + 15) - 10(x + 15) = 0

=> x = 10 or -15

As x>0, x = 10.

Subject: Simplification
Exam Prep: GATE , CAT , Bank Exams , AIEEE
Job Role: Bank PO , Bank Clerk
Q:

1.123 + 11.23 + 112.3 = ?

 

A) 123.453 B) 124.653
C) 125.253 D) 123.953
 
Answer & Explanation Answer: B) 124.653

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0 3304
Q:

Find the factors of (x2 - x - 132)?

 

A) x - 11x - 12 B) (x + 12)(x - 11)
C) (x + 11)(x + 12) D) (x - 12)(x + 11)
 
Answer & Explanation Answer: D) (x - 12)(x + 11)

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2 3561
Q:

What is the simplified value of 5 + 45 - 4 + 5 - 45 + 4 ?

 

A) 9 B) 10
C) 18 D) 20 
 
Answer & Explanation Answer: C) 18

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0 4402
Q:

 

A) 110 B) 220
C) 330 D) 440
 
Answer & Explanation Answer: C) 330

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2 304
Q:

What is the value of 6x2 - 5y26x2 + 5y2, if x = 13 and y = 15?

 

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

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1 5891
Q:

The two equations are 4x + 4ky-6=0 and x+6y-12=0. Find the value of k for the pair of two linear equations represents the parallel lines.

 

A) 2 B)  6
C) 8 D) 10
 
Answer & Explanation Answer: B)  6

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1 326
Q:

Find the y-intercept of the line joining two points (1, 3) and (3, 5).

 

A) -2 B) 0
C) 2 D) 4
 
Answer & Explanation Answer: C) 2

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0 1697
Q:

Calculate the total numbers of prime factors in the expression (5)11 x (5)7 x (7)5 x (3)2 x (17)2.

 

A) 35 B)  36
C) 37 D) 38
 
Answer & Explanation Answer: D) 38

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0 363