## Mathematical operation and symbol notation

#### Mathematical operation and symbol notation

Direction: In the following questions, which one of the four interchanges in signs and numbers would make the given equation correct?

1. 4 x 6 - 2 = 14

1. Interchange '-' to '+' and 2 to 6 and try

##### Correct Option: B

On interchanging '-' to '+' and 2 to 6
4 x 2 + 6 = 14
⇒ 8 + 6 = 14
⇒ 14 = 14

1. (6 ÷ 2) x 3 = 0

1. On interchanging signs 'x' to '-' and 2 to 3
(6 ÷ 3) - 2 = 0
⇒ 2 - 2 = 0
⇒ 0 = 0

##### Correct Option: C

On interchanging signs 'x' to '-' and 2 to 3
(6 ÷ 3) - 2 = 0
⇒ 2 - 2 = 0
⇒ 0 = 0

1. (3 ÷ 4) + 2 = 2

1. On interchanging signs '+' to '÷' and 2 to 3
(2 + 4) ÷ 3 = 2
⇒ 6 ÷ 3 = 2 ⇒ 2 = 2

##### Correct Option: C

On interchanging signs '+' to '÷' and 2 to 3
(2 + 4) ÷ 3 = 2
⇒ 6 ÷ 3 = 2 ⇒ 2 = 2

Direction: Study the following information carefully and answer the given questions. If '+' is coded as 'π' , 'x' is coded as '≠' , '÷' is coded as '\$' and '-' is coded as Δ, then what is the value of the following ?

1. 2 ≠ 7 Δ 4

1. Given, 2 ≠ 7 Δ 4
After interchanging the signs,
2 x 7 - 4
Apply the BODMAS Rule

##### Correct Option: D

Given, 2 ≠ 7 Δ 4
After interchanging the signs,
2 x 7 - 4
Apply the BODMAS Rule
2 x 7 - 4 = 14 - 4 = 10.

Direction: Correct the following equations by interchanging the two signs.

1. 32 x 2 2 ÷ (62 - 9) + 12 = 33

1. Lets try all options one by one.

##### Correct Option: A

If we interchange symbols '-' and '÷', the equation becomes
9 x 4 - (36 ÷ 9) + 1
= 9 x 4 - 36/9 + 1
= 36 - 4 + 1
= 33