13
Q:

Simplify  

A) 6 B) 8
C) 10 D) 12

Answer:   C) 10



Explanation:

Apply 

Hence the answer is 1.5+4.7+3.8=10

Q:

Simplify the following equation

A) K = b /a B) bL = -a
C) KL = 1 D) aK = -b
 
Answer & Explanation Answer: B) bL = -a

Explanation:


=> 

=> - 4KL/4K = a/b

=> L = - a/b

=> bL = -a

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2 49
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 & Explanation 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 =>
multiplying both sides by -1/10x
=>
=> x(x + 15) - 10(x + 15) = 0
=> x = 10 or -15
As x>0, x = 10.

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1 200
Q:

A tailor has 37.5 metres of cloth and he has to make 8 pieces out of a metre of cloth. How many pieces can he make out of half of the cloth he has ?

A) 300 B) 150
C) 175 D) 200
 
Answer & Explanation Answer: B) 150

Explanation:

Half of the cloth = 37.5/2
From 1 meter he will make 8 pieces
=> in 37.5/2 ---- ?

37.5/2 x 8

= 150.

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1 136
Q:

Identify the greatest numbers :  

A.        B.        C.   

A) A B) C
C) Both A and B D) All are equal
 
Answer & Explanation Answer: D) All are equal

Explanation:

     =      =      =>   =     =   

Hence,   ,   and are all equal.

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2 138
Q:

217 x 217 + 183 x 183 = ?

A) 84521 B) 87487
C) 80578 D) 78458
 
Answer & Explanation Answer: C) 80578

Explanation:


= = 2(40000 + 289) = 80578.

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1 152