## Mathematical operation and symbol notation

#### Mathematical operation and symbol notation

1. If L denotes x
M denotes ÷
P denotes +
Q denotes -
then 16 P 24 M 8 Q 6 M 2 L 3 = ?
1. 10
2. 9
3. 12
4. 11

1. 10

##### Correct Option: A

10

1. If > denotes +, < denotes - , + denotes ÷ , ^ denotes x , - denotes = , x denotes > and = denotes < , choose the correct statement of the following :
1. 13 > 7 < 6 + 2 = ^ 4
2. 9 > 5 > 4 - 18 + 9 > 16
3. 9 < 3 < 2 > 1 x 8 ^ 2
4. 28 + 4 ^ 2 = 6 ^ 4 + 2

1. 9 + 5 + 4 = 18 ÷ 9 + 16 = 18 = 18

##### Correct Option: B

9 + 5 + 4 = 18 ÷ 9 + 16 = 18 = 18

1. If, + stand for division; x stands for addition; stands for multiplication; ÷ stands for subtraction, which of the following is correct ?
1. 46 x 6 ÷ 4 - 5 + 3 = 74
2. 46 - 6 + 4 x 5 ÷ 3 = 71
3. 46 ÷ 6 x 4 - 5 + 3 = 75.5
4. 46 x 6 - 4 + 5 ÷ 3 = 70.1

1. After changing '+' = ÷ , '-' = x
'x' = '+' '÷' = -
the equation, 46 - 6 + 4 x 5 ÷ 3 = 71
CHS = 46 x 6 ÷ 4 + 5 - 3
= 276 ÷ 4 + 5 - 3
= 69 + 5 - 3
= 74 - 3 = 71 R.H.S.

##### Correct Option: B

After changing '+' = ÷ , '-' = x
'x' = '+' '÷' = -
the equation, 46 - 6 + 4 x 5 ÷ 3 = 71
CHS = 46 x 6 ÷ 4 + 5 - 3
= 276 ÷ 4 + 5 - 3
= 69 + 5 - 3
= 74 - 3 = 71 R.H.S.

1. After interchanging + and -, 8 and 7, which one of the following becomes correct ?
1. 7 x 8 + 6 - 9 = 25
2. 8 - 7 + 3 x 5 = 35
3. 6 + 8 x 2 - 7 = 0
4. 8 x 2 + 7 - 6 = 9

1. After changing '+' and '-' , 8 and 7 the appropriate equation is,
6 + 8 x 2 - 7 = 0
L.H.S. = 6 - 7 x 2 + 8
6 - 14 + 8
14 - 14 = 0 = R.H.S.

##### Correct Option: C

After changing '+' and '-' , 8 and 7 the appropriate equation is,
6 + 8 x 2 - 7 = 0
L.H.S. = 6 - 7 x 2 + 8
6 - 14 + 8
14 - 14 = 0 = R.H.S.

1. If + stands for division; x stands for addition; - stands for multiplication, ÷ stands for subtraction, Which of the following is correct ?
1. 25 x 3 - 7 ÷ 8 + 12 = 18
2. 25 + 3 x 7 - 8 ÷ 12 = 10.89
3. 25 - 3 ÷ 7 x 8 + 12 = 132
4. 25 ÷ 3 x 7 - 8 + 12 = 19.3

1. 25 ÷ 3 x 7 - 8 + 12 = 19.3

##### Correct Option: D

25 ÷ 3 x 7 - 8 + 12 = 19.3