2
Q:

0.01+0.0064 =?

A) 0.03 B) 0.3
C) 0.42 D) None of these

Answer:   B) 0.3



Explanation:

0.01+0.0064=0.01+6410000=0.01+8100 =0.01+0.08=0.3

Q:

Cube root of 729 then square it

A) 9 B) 36
C) 81 D) 144
 
Answer & Explanation Answer: C) 81

Explanation:

729 = 9 x 9 x 9

=> Cube root of 729 = 9

 

Now, required square of 9 = 9 x 9 = 81.

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0 34
Q:

If (89)2 is added to the square of a number, the answer so obtained is 16202. What is the (1/26) of that number?

A) 5.65 B) 2.7
C) 3.5 D) 6.66
 
Answer & Explanation Answer: C) 3.5

Explanation:

Let the number is = x

(89)2 + x2 = 16202

x2 = 8281

x = 91

=> (1/26) of 91 = 3.5

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10 472
Q:

What should come in place of x in the following equation?

 x128 = 162x

A) 13 B) 12
C) 17 D) 16
 
Answer & Explanation Answer: B) 12

Explanation:

x128 = 162x

 

Then x2 = 162x128

  

   = Sqrt of 82 x 62 x 32

 

   = 8 x 6 x 3

 

   x2  = 144.

 

 x  = 12.

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5 451
Q:

Find the value of 1.21x0.91.1x0.11?

A) 0 B) 1
C) 3 D) 5
 
Answer & Explanation Answer: C) 3

Explanation:

Given   1.21x0.91.1x0.11

 

1.21x100x0.9x101.1x10x0.11x100

 

9

 

= 3.

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5 723
Q:

If x = 2 + 223 + 213 then find the value of x3-6x2+6x ?

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: B) 2

Explanation:

Given that x = 2+ 223 + 213

 

So x - 2 = 223 + 213

 

Now cubing on both sides, we get

 

 

=> x3-8-6x2+12x = 4 + 2 + 6(x-2)

 

Therefore, x3-6x2+6x = -6 + 8 = 2

 

 

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5 536
Q:

If a = 5 + 15 - 1 b = 5 - 15 + 1 then find the value of a2+ab+b2a2-ab+b2 is ::

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

Explanation:

By simplifying, we get 4/3

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3 1048
Q:

If x = 7-43 then find the value of x+1x?

A) 3sqrt{3} B) 8sqrt{3}
C) 14 D) 14+8sqrt{3}
 
Answer & Explanation Answer: C) 14

Explanation:
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31 1681
Q:

3 + 653-212-30+50 = ?

A) 3 B) 3sqrt{2}
C) 6 D) None of these
 
Answer & Explanation Answer: D) None of these

Explanation:
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13 1615