236. The number of digits in the square root of 625686734489 is

1. 1. 4

   
   
   

   2. 5

   
   
   

   3. 6

   
   
   

   4. 7

   
   
   

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1. View Hint View Answer Discuss in Forum

   The number of digits in 625686734489 is 12.
   ∴  Number of digits in its square root = 6
   i.e., √625686734489 = 791003.625

   Correct Option: C

   The number of digits in 625686734489 is 12.
   ∴  Number of digits in its square root = 6
   i.e., √625686734489 = 791003.625

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237. If (10.15)² = 103.0225, then the value of √1.030225 + √10302.25 is

1. 1. 1025·15

   
   
   

   2. 103·515

   
   
   

   3. 102·515

   
   
   

   4. 102·0515

   
   
   

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1. View Hint View Answer Discuss in Forum

   (10.15)² = 103.0225
   ⇒  (1.015)² = 1.030225
   and  (101.5)² = 10302.25
   ∴  √1.030225 + √10302.25
   = √(1.015)² + √(101.5)²
   = 1.015 + 101.5
   = 102.515

   Correct Option: C

   (10.15)² = 103.0225
   ⇒  (1.015)² = 1.030225
   and  (101.5)² = 10302.25
   ∴  √1.030225 + √10302.25
   = √(1.015)² + √(101.5)²
   = 1.015 + 101.5
   = 102.515

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238. = ?

1. 1. 4

   
   
   

   2. 6

   
   
   

   3. 8

   
   
   

   4. 10

   
   
   

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1. View Hint View Answer Discuss in Forum

   Expression
   
   = √8 + 8 = √16 = 4

   Correct Option: A

   Expression
   
   = √8 + 8 = √16 = 4

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239. √	110	1	is equal to
     		4

1. 1. 12.0

   
   
   

   2. 11.5

   
   
   

   3. 11.0

   
   
   

   4. 10.5

   
   
   

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1. View Hint View Answer Discuss in Forum

   √	110	1	=	√	441	=	√	21 × 21
   		4			4			2 × 2

   
   

   =	21	= 10	1	= 10.5
   	2		2

   Correct Option: D

   √	110	1	=	√	441	=	√	21 × 21
   		4			4			2 × 2

   
   

   =	21	= 10	1	= 10.5
   	2		2

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240. The simplified value of

     is :

1. 1. 3

   
   
   

   2. 2

   
   
   

   3. 4

   
   
   

   4. 6

   
   
   

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1. View Hint View Answer Discuss in Forum

   Expression
   
   = √5 + 4 = √9 = 3

   Correct Option: A

   Expression
   
   = √5 + 4 = √9 = 3

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