Mathematical operation and symbol notation


  1. In the following question, * stands for any of the mathematical signs at different places, which are given as choices under each question. Select the choice with the correct sequence of signs which when substituted makes the question as a correct equation.
    24 * 4 * 5 * 4
    1. x + =
    2. = x +
    3. + x =
    4. = + x

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    Apply all option one by one .

    Correct Option: B

    From option (b),
    24 = 4 x 5 + 4
    ⇒ 24 = 20 + 4 ⇒ 24 = 24


  1. Select the correct combination of mathematical signs to replace * signs and to balance the given equation.
    16 * 6 * 4 * 24
    1. ÷ = x
    2. x = ÷
    3. = ÷ ÷
    4. x ÷ =

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    Apply all option one by one

    Correct Option: D

    Apply all option one by one
    ∵ 16 x 6 ÷ 4 = 24
    ⇒ 96/4 = 24 ⇒ 24 = 24



  1. Select the correct combination of mathematical signs to replace * signs and to balance the given equation.
    9 * 3 * 3 * 3 * 6
    1. ÷ x - =
    2. + - x =
    3. - + + =
    4. x + - =

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    Apply all option one by one

    Correct Option: A

    ∵ 9 ÷ 3 x 3 - 3 = 6 ∵ 3 x 3 - 3 = 6
    ⇒ 9 - 3 = 6 ⇒ 6 = 6


  1. Select the correct combination of mathematical signs to replace * signs and to balance the given equation.
    8 * 6 * 96 * 2 = 0
    1. x ÷ -
    2. x - ÷
    3. - x ÷
    4. ÷ - x

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    Apply all the option one by one

    Correct Option: B

    ∵ 8 * 6 * 96 * 2 = 0
    ⇒ 8 x 6 - 96 ÷ 2 = 0
    ⇒ 48 - 48 = 0



  1. Which of the following interchange of number would make the given equation correct ?
    8 x 20 ÷ 3 + 9 - 5 = 38
    1. 3, 9
    2. 3, 8
    3. 8, 9
    4. 3, 5

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    Apply all option one by one

    Correct Option: D

    ∵ 8 x 20 ÷ 3 + 9 - 5 = 38 ⇒ 8 x 20 ÷ 5 + 9 - 3 = 38
    ⇒ 8 x 4 = 9 - 3 = 38 ⇒ 32 + 9 - 3 = 38