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21.
138.009 + 341.981 - 146.305 = 123.6 + ?
  • A.
    120.085
  • C.
    220.085
  • B.
    120.85
  • D.
    None of these
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Answer : [A]
Explanation :
 
Let 138.009 + 341.981 - 146.305 = 123.6 + x
 
Then, x = (138.009 + 341.981) - (146.305 + 123.6) = 479.99 - 269.905 = 210.085.
 
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22.
If
144
0.144
=
14.4
x
, then the value of x is:  
  • A.
    0.0144
  • C.
    14.4
  • B.
    1.44
  • D.
    144
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Answer : [A]
Explanation :
 
 
144
0.144
=
14.4
x
   
 
 
144 x 1000
144
=
14.4
x
   
 
  x =
14.4
1000
   
 
  = 0.0144      
 
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23.
3.87 - 2.59 = ?
  • A.
    1.20
  • C.
    1.27
  • B.
    1.2
  • D.
    1.28
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Answer : [D]
Explanation :
 
3.87 - 2.59 = (3 + 0.87) - (2 + 0.59) =   3 +
87
99
  -   2 +
59
99
  = 1 +  
87
99
-
59
99
     
 
=  1 + 
28
99
 = 1.28    
 
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24.
0.0203 x 2.92
0.0073 x 14.5 x 0.7
 = ?        
  • A.
    0.8
  • C.
    2.40
  • B.
    1.45
  • D.
    3.25
  • Answer & Explanation
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Answer : [A]
Explanation :
 
0.0230 x 2.92
0.0073 x 14.5 x 0.7
=
203 x 292
73 x 145 x 7
 =
4
5
 = 0.8  
 
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25.
0.36 expressed in the form of
p
q
  equals:  
  • A.
    4  
    11  
  • C.
    35  
    90  
  • B.
    4    
    13  
  • D.
    35    
    99  
  • Answer & Explanation
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Answer : [A]
Explanation :
 
0.36 =
36
99
=
4
11
       
 
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