331. Simplify
     

1. 1. 18

   
   
   

   2. 36

   
   
   

   3. 39

   
   
   

   4. 78

   
   
   

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1. View Hint View Answer Discuss in Forum

   
   

   =		13	÷	1		=	13
   		4		24			6

   
   

   =		13	× 24		=	13
   		4				6

   
   

   = 13 × 6 ×	6	= 36
   	13

   Correct Option: B

   
   

   =		13	÷	1		=	13
   		4		24			6

   
   

   =		13	× 24		=	13
   		4				6

   
   

   = 13 × 6 ×	6	= 36
   	13

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332. 
     is equal to

1. 1. 9

   
   
   

   2. 11	1
      	2

   
   
   

   3. 13

   
   
   

   4. 15	1
      	2

   
   
   

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1. View Hint View Answer Discuss in Forum

   
   

   =	31	×	30	−	5
   	12		5		2

   
   

   =	31	−	5	=	31 − 5	=	26
   	2		2		2		2

   
   = 13

   Correct Option: C

   
   

   =	31	×	30	−	5
   	12		5		2

   
   

   =	31	−	5	=	31 − 5	=	26
   	2		2		2		2

   
   = 13

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333. 	5	+	3			25	−	15	+	9		is equal to
     	2		2			4		4		4

1. 1. 38

   
   
   

   2. 19

   
   
   

   3. 37

   
   
   

   4. 36

   
   
   

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1. View Hint View Answer Discuss in Forum

   	5	+	3			25	−	15	+	9
   	2		2			4		4		4

   
   

   = 4 ×	19	= 19
   	4

   Correct Option: B

   	5	+	3			25	−	15	+	9
   	2		2			4		4		4

   
   

   = 4 ×	19	= 19
   	4

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334. For what value of *, statement
     

     	(*)	×	(*)		= 1 is correct ?
     	21		189

1. 1. 3969

   
   
   

   2. 147

   
   
   

   3. 63

   
   
   

   4. 21

   
   
   

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1. View Hint View Answer Discuss in Forum

   Let ‘*’ be H
   

   	(H)	×	(H)		= 1
   	21		189

   
   ⇒  (H)² = 21 × 189
   ⇒  H = √21 × 189 = 63

   Correct Option: C

   Let ‘*’ be H
   

   	(H)	×	(H)		= 1
   	21		189

   
   ⇒  (H)² = 21 × 189
   ⇒  H = √21 × 189 = 63

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335. =	0.83 ÷ 7.5	is equal to
     	2.321 − 0.098

1. 1. 0.6

   
   
   

   2. 0.1

   
   
   

   3. 0.06

   
   
   

   4. 0.05

   
   
   

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1. View Hint View Answer Discuss in Forum

   =	0.83 ÷ 7.5
   	2.321 − 0.098

   
   

   =		83 − 8	÷ 7.5
   		90
   	2	321 − 3	−	98
   		990		990

   
   

   =		75	÷ 7.5
   		90
   	2	318	−	98
   		990		990

   
   

   =		75	÷ 7.5
   		90
   	2	220
   		990

   
   

   =	7.5	×	990	=	1	= 0.05
   	90 × 7.5		2200		20

   Correct Option: D

   =	0.83 ÷ 7.5
   	2.321 − 0.098

   
   

   =		83 − 8	÷ 7.5
   		90
   	2	321 − 3	−	98
   		990		990

   
   

   =		75	÷ 7.5
   		90
   	2	318	−	98
   		990		990

   
   

   =		75	÷ 7.5
   		90
   	2	220
   		990

   
   

   =	7.5	×	990	=	1	= 0.05
   	90 × 7.5		2200		20

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