21. Given that √4096 = 64, the value of √4096 + √40.96 + √.004096 is ?

1. 1. 70.4

   
   
   

   2. 70.464

   
   
   

   3. 71.104

   
   
   

   4. 71.4

   
   
   

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1. View Hint View Answer Discuss in Forum

   √4096 + √40.96 + √.004096
   = √4096 + √4096/100 + √4096/1000000
   =√4096 + √4096/10 + √4096/1000

   Correct Option: B

   √4096 + √40.96 + √.004096
   = √4096 + √4096/100 + √4096/1000000
   =√4096 + √4096/10 + √4096/1000
   = 64 + 64/10 + 64/1000
   = 70.464

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22. √.04

1. 1. .02

   
   
   

   2. .2

   
   
   

   3. .002

   
   
   

   4. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   √.04 = √4/100

   Correct Option: B

   √.04 = √4/100
   = 2/10
   = 0.2
   
   

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23. √288 / √128

1. 1. √3/2

   
   
   

   2. 3/√2

   
   
   

   3. 3/2

   
   
   

   4. √3/2

   
   
   

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1. View Hint View Answer Discuss in Forum

   √288 / √128 = √9/4

   Correct Option: C

   √288 / √128 = √9/4
   = 3/2
   

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24. √10 x √15 ?

1. 1. 5√6

   
   
   

   2. 6√5

   
   
   

   3. 5

   
   
   

   4. √30

   
   
   

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1. View Hint View Answer Discuss in Forum

   √10 x √15
   = √10 x 15
   = √150
   = √25 x 6
   = √25 x √6

   Correct Option: A

   √10 x √15
   = √10 x 15
   = √150
   = √25 x 6
   = √25 x √6
   = 5√6

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25. √ ? / 200 = 0.02 ?

1. 1. 0.4

   
   
   

   2. 4

   
   
   

   3. 16

   
   
   

   4. 1.6

   
   
   

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1. View Hint View Answer Discuss in Forum

   Let √x / 200 = 0.02
   Then, √x = 200 x 0.02 = 4.

   Correct Option: C

   Let √x / 200 = 0.02
   Then, √x = 200 x 0.02 = 4.
   So, x = 16
   

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