Mathematical operation and symbol notation


  1. if 'R' means '÷', 'Q' means 'x', 'P' means '+', then 1 8 R 9 P 2 Q 8 = ?
    1. 18
    2. 16
    3. 28
    4. 30

  1. View Hint View Answer Discuss in Forum

    Using the correct symbols, we have
    1 8 R 9 P 2 Q 8
    = 18 ÷ 9 + 2 x 8

    Correct Option: A

    Using the correct symbols, we have
    1 8 R 9 P 2 Q 8
    = 18 ÷ 9 + 2 x 8
    = 2 + 2 x 8 = 2 + 16 = 18


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

  1. 3 - 9 x 27 + 9 ÷ 3 = 3
    1. + and -
    2. x and +
    3. x and ÷
    4. - and ÷
    5. x and -

  1. View Hint View Answer Discuss in Forum

    Lets try all options one by one.

    Correct Option: E

    If we interchange 'x' and '-' , the equation changes into
    3 x 9 - 27 + 9 ÷ 3 = 27 - 27 + 3 = 3



  1. 4 x 2 + 6 ÷ 2 - 12 = 2
    1. ÷ and x
    2. + and -
    3. x and +
    4. ÷ and -
    5. x and -

  1. View Hint View Answer Discuss in Forum

    Lets try all options one by one.

    Correct Option: A

    If we interchanges signs '÷' and 'x', then the equation changes into
    4 ÷ 2 + 6 x 2 - 12 = 2 + 12 - 12 - 2


  1. 5 x 15 ÷ 7 - 20 + 4 = 77
    1. - and +
    2. x and ÷
    3. + and ÷
    4. + and x
    5. - and ÷

  1. View Hint View Answer Discuss in Forum

    Lets try all options one by one.

    Correct Option: C

    If we interchanges signs '+' and '÷', then the equation changes into
    5 x 15 + 7 - 20 ÷ 4 = 5 x 15 + 7 - 5 = 77



  1. 16 - 21 ÷ 7 x 6 + 3 = 31
    1. - and +
    2. + and x
    3. ÷ and +
    4. ÷ and x
    5. - and x

  1. View Hint View Answer Discuss in Forum

    Lets try all options one by one.

    Correct Option: B

    If we interchange of signs '+' and 'x', then the equation changes into
    16 - 21 ÷ 7 + 6 x 3 = 16 - 3 + 18 = 31