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56.
If
547.527
0.0082
 = x, then the value of
547527
82
 is:  
  • A.
    		 x  
    10  
  • C.
    100x
  • B.
    10x
  • D.
    None of these
  • Answer & Explanation
  • Report
Answer : [A]
Explanation :
 
547527
82
=
54.7527
0.0082
 =  
547.527
0.0082
x
1
10
  =
x
10
   
 
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57.
The value of (4.7 x 13.26 + 4.7 x 9.43 + 4.7 x 77.31) is :
  • A.
    0.47
  • C.
    470
  • B.
    47
  • D.
    4700
  • Answer & Explanation
  • Report
Answer : [C]
Explanation :
 
Given expression = 4.7 x (13.26 + 9.43 + 77.31) = 4.7 x 100 = 470
 
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58.
The value of
(2.697 - 0.498)2 + (2.697 + 0.498)2
2.697 x 2.697 + 0.498 x 0.498
   
  • A.
    0.5
  • C.
    2.199
  • B.
    2
  • D.
    3.195
  • Answer & Explanation
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Answer : [B]
Explanation :
 
Given expression =
(a-b)2 + (a+b)2
a2 + b2
=
2(a2+b2)
(a2+b2)
 = 2  
 
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59.
The value of
(67.542)2 - (32.458)2
75.458 - 40.374
 is:  
  • A.
    1
  • C.
    100
  • B.
    10
  • D.
    None of these
  • Answer & Explanation
  • Report
Answer : [C]
Explanation :
 
Given expression =
(67.542)2 - (32.458)2
(67.542 + 7.196) - (32.458 + 7.916)
   
 
 
(67.542)2 - (32.458)2
67.542 - 32.458
 = (67.542 + 32.458) = 100  
 
 
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60.
The value of  
0.051 x 0.051 x 0.051 + 0.041 x 0.041 x 0.041
0.051 x 0.051 - 0.051 x 0.041 + 0.041 x 0.041
   is :    
  • A.
    0.00092
  • C.
    0.092
  • B.
    0.0092
  • D.
    0.92
  • Answer & Explanation
  • Report
Answer : [C]
Explanation :
Given expression =
(0.051)3 + (0.041)3
(0.051)2 - (0.051 x 0.041) + (0.041)2
=  
a3+b3
a2-ab+b2
   
 
  = (a + b) = (0.051 + 0.041) = 0.092  
 
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