36. 0.8 x ? =0.0004

1. 1. .0005

   
   
   

   2. .005

   
   
   

   3. .5

   
   
   

   4. .00005

   
   
   

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1. View Hint View Answer Discuss in Forum

   Let 0.8y = 0.0004
   Then,y = 0.0004 / 0.8

   Correct Option: A

   Let 0.8y = 0.0004
   Then,y = 0.0004 / 0.8
   = 0.004 / 8
   = .0005

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37. 0.9 x 0.008=?

1. 1. 0.072

   
   
   

   2. 0.0072

   
   
   

   3. 0.00072

   
   
   

   4. .72

   
   
   

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1. View Hint View Answer Discuss in Forum

   ∵ 9 x 8=72
   ∴ 0.09 x 0.008 = 0.00072 (Five place of decimal )

   Correct Option: C

   ∵ 9 x 8=72
   ∴ 0.09 x 0.008 = 0.00072 (Five place of decimal )

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38. ? % of 10.8 =32.4

1. 1. 3

   
   
   

   2. 30

   
   
   

   3. 300

   
   
   

   4. 0.3

   
   
   

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1. View Hint View Answer Discuss in Forum

   Let k % of 10.8=32.4
   ⇒ (k x 10.8) / 100 = 32.4

   Correct Option: C

   Let k % of 10.8=32.4
   ⇒ (k x 10.8) / 100 = 32.4
   ⇒ k = (32.4 x 100 )/10.8
   = 300

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39. ? / .0025 = 800

1. 1. .2

   
   
   

   2. .02

   
   
   

   3. 2000

   
   
   

   4. 2

   
   
   

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1. View Hint View Answer Discuss in Forum

   Let k / .0025=800
   Then, k = 800 x .0025

   Correct Option: D

   Let k / .0025=800
   Then, k = 800 x .0025
   = ( 800 x 25 ) / 10000
   = 2

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40. 0.001 / ? = 0.01

1. 1. 10

   
   
   

   2. .1

   
   
   

   3. .01

   
   
   

   4. .001

   
   
   

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1. View Hint View Answer Discuss in Forum

   Let 0.001 / x = 0.01
   Then , x = 0.001 / 0.01

   Correct Option: B

   Let 0.001 / x = 0.01
   Then , x = 0.001 / 0.01
   = 0.001 / 0.010
   = 1 / 10
   = 0.1

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