Mathematical Operations Questions and Answers

Q: If ‘+’ means ‘divided by’, ‘-‘ means ‘added to’, ‘×’ means ‘subtracted from’ and ‘÷’ means ‘multiplied by’, then what is the value of 15 ÷ 12 - 36 + 3 ?

Correct answer: 192Substituting gives \[ 15 \times 12 + 36 \div 3 = 180 + 12 = 192. \] Note that the two symbols are exchanged in an unexpected direction here - the divide sign means multiply and the plus means divide - so reading the expression at face value would give something quite different.

Q: If ‘+’ stands for ‘×’, ‘-‘ for ‘÷’, ‘×’ for ‘-‘ and ‘÷’ for ‘+’, find the value of 12 + 90 - 5 × 9 ÷ 3.

Correct answer: 210Substituting gives \[ 12 \times 90 \div 5 - 9 + 3. \] Multiplication and division first, left to right: \( 12\times90 = 1080 \), \( 1080\div5 = 216 \). Then \( 216 - 9 + 3 = 210 \). Stopping at 216, before the last two terms are applied, gives the second option offered.

Q: If P denotes ÷; Q denotes ×, R denotes + and S denotes -, then what is the value of 18 Q 12 P 4 R 5 S 6 ?

Correct answer: 53Substituting gives \[ 18 \times 12 \div 4 + 5 - 6. \] The multiplication and division are taken first, left to right: \( 18\times12 = 216 \), \( 216\div4 = 54 \). Then \( 54 + 5 - 6 = 53 \).

Q: If L stands for +, M stands for -, N stands for ×, P stands for ÷, then 14 N 10 L 42 P 2 M 8 = ?

Correct answer: 153Substituting gives \[ 14 \times 10 + 42 \div 2 - 8 = 140 + 21 - 8 = 153. \] Both the multiplication and the division are completed before anything is added or subtracted, which is what keeps the two products separate rather than running them into one another.

Q: If P means ‘division; T means ‘addition; M means ‘subtraction’ and D means ‘multiplication’, then what will be the value of the expression 12 M 12 D 28 P 7 T 15?

Correct answer: – 21Substituting gives \[ 12 - 12 \times 28 \div 7 + 15. \] Multiplication and division first: \( 12\times28 = 336 \), \( 336\div7 = 48 \). Then \( 12 - 48 + 15 = -21 \). The negative result is the point of the item - the middle term is far larger than either of the others.

Q: If Q means ‘add’ to; J means ‘Multiply by’, T means ‘subtract from’ and K means ‘divide by’ then 30 K 2 Q 3 J 6 T 5 = ?

Correct answer: 28Substituting gives \[ 30 \div 2 + 3 \times 6 - 5. \] Taking the division and multiplication first: \( 30\div2 = 15 \) and \( 3\times6 = 18 \). Then \( 15 + 18 - 5 = 28 \).

Q: If P denotes ‘multiplied’ by’, T denotes ‘subtracted’ from’, M denotes ‘add to’ and B denotes ‘divided by’, then 28 B 7 P 8 T 6 M 4 =?

Correct answer: 30Substituting gives \[ 28 \div 7 \times 8 - 6 + 4. \] Division and multiplication first, left to right: \( 28\div7 = 4 \), \( 4\times8 = 32 \). Then \( 32 - 6 + 4 = 30 \).

Important Instructions

111.

If ‘+’ means ‘divided by’, ‘-‘ means ‘added to’, ‘×’ means ‘subtracted from’ and ‘÷’ means ‘multiplied by’, then what is the value of 15 ÷ 12 - 36 + 3 ?

A.180
B.195
C.192
D.200

Answer: C

Correct answer: 192

Substituting gives \[ 15 \times 12 + 36 \div 3 = 180 + 12 = 192. \] Note that the two symbols are exchanged in an unexpected direction here - the divide sign means multiply and the plus means divide - so reading the expression at face value would give something quite different.

Discuss in Forum

112.

If ‘+’ stands for ‘×’, ‘-‘ for ‘÷’, ‘×’ for ‘-‘ and ‘÷’ for ‘+’, find the value of 12 + 90 - 5 × 9 ÷ 3.

A.210
B.216
C.215
D.120

Answer: C

Correct answer: 210

Substituting gives \[ 12 \times 90 \div 5 - 9 + 3. \] Multiplication and division first, left to right: \( 12\times90 = 1080 \), \( 1080\div5 = 216 \). Then \( 216 - 9 + 3 = 210 \). Stopping at 216, before the last two terms are applied, gives the second option offered.

Discuss in Forum

113.

If P denotes ÷; Q denotes ×, R denotes + and S denotes -, then what is the value of 18 Q 12 P 4 R 5 S 6 ?

A.53
B.59
C.63
D.65

Answer: A

Correct answer: 53

Substituting gives \[ 18 \times 12 \div 4 + 5 - 6. \] The multiplication and division are taken first, left to right: \( 18\times12 = 216 \), \( 216\div4 = 54 \). Then \( 54 + 5 - 6 = 53 \).

Discuss in Forum

114.

If L stands for +, M stands for -, N stands for ×, P stands for ÷, then 14 N 10 L 42 P 2 M 8 = ?

A.153
B.216
C.248
D.251

Answer: A

Correct answer: 153

Substituting gives \[ 14 \times 10 + 42 \div 2 - 8 = 140 + 21 - 8 = 153. \] Both the multiplication and the division are completed before anything is added or subtracted, which is what keeps the two products separate rather than running them into one another.

Discuss in Forum

115.

If P means ‘division; T means ‘addition; M means ‘subtraction’ and D means ‘multiplication’, then what will be the value of the expression 12 M 12 D 28 P 7 T 15?

A.- 30
B.- 15
C.15
D.- 21

Answer: D

Correct answer: – 21

Substituting gives \[ 12 - 12 \times 28 \div 7 + 15. \] Multiplication and division first: \( 12\times28 = 336 \), \( 336\div7 = 48 \). Then \( 12 - 48 + 15 = -21 \). The negative result is the point of the item - the middle term is far larger than either of the others.

Discuss in Forum

116.

If Q means ‘add’ to; J means ‘Multiply by’, T means ‘subtract from’ and K means ‘divide by’ then 30 K 2 Q 3 J 6 T 5 = ?

A.18
B.28
C.31
D.103

Answer: B

Correct answer: 28

Substituting gives \[ 30 \div 2 + 3 \times 6 - 5. \] Taking the division and multiplication first: \( 30\div2 = 15 \) and \( 3\times6 = 18 \). Then \( 15 + 18 - 5 = 28 \).

Discuss in Forum

117.

If P denotes ‘multiplied’ by’, T denotes ‘subtracted’ from’, M denotes ‘add to’ and B denotes ‘divided by’, then 28 B 7 P 8 T 6 M 4 =?

A.-3/2
B.30
C.32
D.34

Answer: B

Correct answer: 30

Substituting gives \[ 28 \div 7 \times 8 - 6 + 4. \] Division and multiplication first, left to right: \( 28\div7 = 4 \), \( 4\times8 = 32 \). Then \( 32 - 6 + 4 = 30 \).

Discuss in Forum

Mathematical Operations Questions and Answers

Important Instructions

Topics

Other Subjects

About Us

Mathematical Operations Questions and Answers

Important Instructions

Topics

Other Subjects

About Us

Stay informed about all important Dates & Notifications