Letter and Symbol Series


  1. If ' + ' mean ' - ' , ' - ' means ' x ', ' x ' means ' ÷ ' and ' ÷ ' means ' + ' , then the value of
    16 x 2 ÷ 25 + 7 - 4     is.









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    16 x 2 ÷ 25 + 7 - 4
    After replacing the sign according to the given question
    16 ÷ 2 + 25 - 7 x 4
    Apply the rule BODMAS
    B - Brackets first
    O - Orders (i.e. Powers and Square Roots, etc.)
    DM - Division and Multiplication (left-to-right)
    AS - Addition and Subtraction (left-to-right)

    Correct Option: B

    16 x 2 ÷ 25 + 7 - 4
    After replacing the sign according to the given question
    16 ÷ 2 + 25 - 7 x 4
    Apply the rule BODMAS
    B - Brackets first
    O - Orders (i.e. Powers and Square Roots, etc.)
    DM - Division and Multiplication (left-to-right)
    AS - Addition and Subtraction (left-to-right)
                 = 16 ÷ 2 + 25 - 7 x 4
                 = 8 + 25 - 28
                 = 25 - 20
                 = 5


  1. If ' - ' stands for ' ÷ ' , ' + ' stands for ' x ' , ' ÷ ' stands for ' - ' and ' x ' stands for ' + ' , find out which one is correct .









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    Try all option one by one;
    From option ( b )
    49 - 7 + 3 ÷ 5 x 8 = 24
    Change the sign, as per the question,
    49 ÷ 7 x 3 - 5 + 8 = 24
    Apply the BODMAS rule
    B - Brackets first
    O - Orders (i.e. Powers and Square Roots, etc.)
    DM - Division and Multiplication (left-to-right)
    AS - Addition and Subtraction (left-to-right)

    Correct Option: B

    Try all option one by one;
    From option ( b )
    49 - 7 + 3 ÷ 5 x 8 = 24
    Change the sign, as per the question,
    49 ÷ 7 x 3 - 5 + 8 = 24
    Apply the BODMAS rule
    B - Brackets first
    O - Orders (i.e. Powers and Square Roots, etc.)
    DM - Division and Multiplication (left-to-right)
    AS - Addition and Subtraction (left-to-right)
    Now Applying the BODMAS rule one by one.
    49 ÷ 7 x 3 - 5 + 8 = 24
    After Division
    7 x 3 - 5 + 8 = 24
    After Multiplication
    21 - 5 + 8 = 24
    After Addition
    29 - 5 = 24
    After subtraction
    24 = 24



  1. Select the correct combination of mathematical signs to replace '*' signs and to balance the following equation.
            6 * 4 * 12 * 12









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    Try all option one by one;
    From option (d),
    6 * 4 * 12 * 12
    Change the sign, as per the question,
    6 x 4 - 12 = 12
    Apply the BODMAS rule
    B - Brackets first
    O - Orders (i.e. Powers and Square Roots, etc.)
    DM - Division and Multiplication (left-to-right)
    AS - Addition and Subtraction (left-to-right)

    Correct Option: D

    Try all option one by one;
    From option (d),
    6 * 4 * 12 * 12
    Change the sign, as per the question,
    6 x 4 - 12 = 12
    Apply the BODMAS rule
    After Multiplication
    24 - 12 = 12
    After Substraction
    ⇒      12 = 12


  1. If ' x ' stands for ' + ', ' < ' for ' - ', ' + ', for ' ÷ ', ' > ' for ' x ', ' - ' for ' = ', ' ÷ ' for ' > ' and ' = ' for ' < '. then satae which of the following is true .









  1. View Hint View Answer Discuss in Forum

    Try All option one by one;
    Replace the sign as per question;
    After Replacing the Sign Apply the BODMAS Rule.

    Correct Option: C

    Using the proper symbols in ( c ), we get
    5 x 2 ÷ 2 < 10 -4 + 8
    After Replacing the Sign Apply the BODMAS Rule.
    ⇒       5 x 1 < 18 - 4
    ⇒       5 < 14
    which is true .



Direction: These questions are based on letter series. In each of these series, some letters are missing. Select the correct alternative.

  1. a_c_ba_ca_cb









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    The sequence is made of repetition of abc in different order, so identify the missing alphabet in abc .

    Correct Option: D

    The sequence is made of repetition of abc in different order, so identify the missing alphabet in abc .
    second word is reverse of first word, similar way 4th word is reverse of 3r word.
    By option (d),
    abc/cba/bca/acb ⇒ bcba