61. Given interchanges signs '+' and 'x', numbers '3' and '7'

1. 1. 23 + 17 x 73 = 1241

   
   
   

   2. 37 + 73 x 12 = 112

   
   
   

   3. 23 x 17 + 37 = 428

   
   
   

   4. 23 + 17 x 73 = 388

   
   
   

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1. View Hint View Answer Discuss in Forum

   (a) 27 x 13 + 37 ≠ 1241
   (b) 73 x 37 + 12 ≠ 112
   (c) 27 + 13 x 73 ≠ 428
   (d) 27 x 13 + 37 = 388

   Correct Option: D

   (a) 27 x 13 + 37 ≠ 1241
   (b) 73 x 37 + 12 ≠ 112
   (c) 27 + 13 x 73 ≠ 428
   (d) 27 x 13 + 37 = 388

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62. Given interchanges signs '-' and ' ÷'; numbers '2' and '6'

1. 1. 32 - 12 ÷ 6 = 30
      

   
   
   

   2. 36 ÷ 12 - 2 = 1

   
   
   

   3. 32 - 16 ÷ 6 = 1

   
   
   

   4. 36 - 12 ÷ 2 = 30

   
   
   

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1. View Hint View Answer Discuss in Forum

   (a) 36 ÷ 16 - 2 ≠ 30
   (b) 32 - 16 ÷ 6 ≠ 1
   (c) 36 ÷ 12 - 2 = 1
   (d) 32 ÷ 16 - 6 ≠ 30

   Correct Option: C

   (a) 36 ÷ 16 - 2 ≠ 30
   (b) 32 - 16 ÷ 6 ≠ 1
   (c) 36 ÷ 12 - 2 = 1
   (d) 32 ÷ 16 - 6 ≠ 30

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63. Given interchanges signs 'x' and '÷'; numbers '4' and '9'

1. 1. 94 x 7 ÷ 47 = 324

   
   
   

   2. 94 x 7 ÷ 97 = 329

   
   
   

   3. 49 x 7 ÷ 49 = 7

   
   
   

   4. 47 x 9 ÷ 94 = 18

   
   
   

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1. View Hint View Answer Discuss in Forum

   (a) 49 ÷ 7 x 97 ≠ 324
   (b) 49 ÷ 7 x 47 = 329
   (c) 94 ÷ 7 x 94 ≠ 7
   (d) 97 ÷ 4 x 49 ≠ 18

   Correct Option: B

   (a) 49 ÷ 7 x 97 ≠ 324
   (b) 49 ÷ 7 x 47 = 329
   (c) 94 ÷ 7 x 94 ≠ 7
   (d) 97 ÷ 4 x 49 ≠ 18

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64. Select the correct combination of mathematical signs to replace * signs and to balance the following equation
    8 * 8 * 1 * 7 = 8

1. 1. x ÷ +

   
   
   

   2. + ÷ x

   
   
   

   3. ÷ x +

   
   
   

   4. + x ÷

   
   
   

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1. View Hint View Answer Discuss in Forum

   From option (c),
   8 * 8 * 1 * 7 = 8
   ⇒ 8 ÷ 8 x 1 + 7 = 8
   ∴ 8 = 8

   Correct Option: C

   From option (c),
   8 * 8 * 1 * 7 = 8
   ⇒ 8 ÷ 8 x 1 + 7 = 8
   ∴ 8 = 8

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