In the following question, correct the equation by interchanging the two signs.

6 ÷ 17 x 51 + 6 – 12 = – 4

• x and ÷

• + and ÷

• + and -

• - and ÷

If 6 * 9 – 4 = 58 and 3 * 9 – 7 = 34, then in the expression A * 4 – 9 = 91, what is the value of 'A'?

• 6.5

• 17.5

• 20.5

• 30.5

If "–" means "divided by", "+" means "multiplied by", "÷" means "added to", "x" means "subtracted from", then

11 ÷ 6 – 2 + 5 x 3 = ?

• 17

• 21

• 23

• 26

If 3 # 6 * 9 = 45 and 9 # 8 * 7 = 105, then what is the value of 5 * 6 # 3 = ?

• 14

• 68

• 86

• 90

In the following question, by using which mathematical operators will the expression become correct?

30 ? 6 ? 4 ? 5 ? 4

• -, =, x and +

• +, = x and -

• =, x, + and -

• -, +, = and x

If 13 # 9 = 94 and 18 # 7 = 100, then 24 # 6 = ?

• 121

• 113

• 148

• 115

If "–" means "added to", "+" means "divided by", "÷" means "multiplied by", "x" means "subtracted from", then
13 + 12 x 9 ÷ 3 – 6 = ?

• $-\frac{117}{11}$

• $\frac{117}{11}$

• $-\frac{237}{12}$

• $-\frac{239}{12}$

If 6 @ 4 @ 7 = 101 and 2 @ 5 @ 11 = 150, then what is the value of A in A @ 8 @ 9 = 289?

• 5

• 8

• 12

• 17

In the following question, by using which mathematical operators will the expression become correct?

15 _ 3 _ 4 _ 20

• x, ÷  and > 

• ÷, x and <

• ÷, x and =

• +, x and <

If 19 $ 7 = 312 and 23 $ 9 = 448, then 31 $ 11 = ?

• 231

• 441

• 641

• 840