Mathematical operation and symbol notation


  1. If given, 12 (169) 5, 4 (20) 2 and 1 (26) 5, then 7 (?) 3
    1. 78
    2. 68
    3. 58
    4. 36

  1. View Hint View Answer Discuss in Forum

    As, 122 + 5 2 ⇒ 144 + 25 = 169
    42 + 22 ⇒ 16 + 4 = 20
    and 12 + 52 ⇒ 1 + 25 = 26
    Similarly,
    72 + 32 = 49 + 9 = 58

    Correct Option: C

    As, 122 + 5 2 ⇒ 144 + 25 = 169
    42 + 22 ⇒ 16 + 4 = 20
    and 12 + 52 ⇒ 1 + 25 = 26
    Similarly,
    72 + 32 = 49 + 9 = 58


  1. Select the correct combination of mathematical signs to replace * signs and to balance the given equation.
    5 * 6 * 5 * 8 * 14
    1. + - x =
    2. x ÷ + =
    3. ÷ x = -
    4. + x - ÷

  1. View Hint View Answer Discuss in Forum

    Solve the equation by using option one by one.
    5 * 6 * 5 * 8 * 14
    From option (b),
    After changing the symbol as per question,
    5 x 6 ÷ 5 + 8 = 14
    Apply the BODMAS Rule,
    ⇒ 5 x 6/5 + 8 = 14

    Correct Option: B

    Solve the equation by using option one by one.
    5 * 6 * 5 * 8 * 14
    From option (b),
    After changing the symbol as per question,
    5 x 6 ÷ 5 + 8 = 14
    Apply the BODMAS Rule,
    ⇒ 5 x 6/5 + 8 = 14
    ∴ 14 = 14



  1. If '-' mean 'x', 'x' means '+', '+' means '÷' and '÷' means '-', then
    40 x 12 + 3 - 6 ÷ 60 = ?
    1. 44
    2. 16
    3. 7.95
    4. 4

  1. View Hint View Answer Discuss in Forum

    Given question is,
    40 x 12 + 3 - 6 ÷ 60
    According to the question, putting the real values of signs,
    40 + 12 ÷ 3 x 6 - 60 = 40 + 4 x 6 - 60
    Apply the BODMAS Rule
    = 40 + 24 - 60 = 64 - 60 = 4

    Correct Option: D

    Given question is,
    40 x 12 + 3 - 6 ÷ 60
    According to the question, putting the real values of signs,
    40 + 12 ÷ 3 x 6 - 60 = 40 + 4 x 6 - 60
    Apply the BODMAS Rule
    = 40 + 24 - 60 = 64 - 60 = 4


  1. If '+' means '÷', 'x' means '+', '-' means 'x' and '÷' means '-', then which of the following equation is correct?
    1. 36 + 6 x 3 + 2 = 20
    2. 36 + 6 - 3 x 2 = 20
    3. 36 x 6 + 3 - 2 < 20
    4. 36 x 6 + 3 x 2 > 20

  1. View Hint View Answer Discuss in Forum

    Solve all option one by one,
    36 + 6 - 3 x 2 = 20
    After changing the symbol as per question,
    36 ÷ 6 x 3 + 2 = 20
    Apply the BODMAS rule,
    ⇒ 6 x 3 + 2 = 20

    Correct Option: B

    Solve all option one by one,
    36 + 6 - 3 x 2 = 20
    After changing the symbol as per question,
    36 ÷ 6 x 3 + 2 = 20
    Apply the BODMAS rule,
    ⇒ 6 x 3 + 2 = 20
    ⇒ 18 + 2 = 20
    ⇒ 20 = 20



Direction: In these questions, relationship between different elements is shown in the statements. These statements are followed by two conclusions.

  1. Statements ::
    D > B, C > K, K ≤ N, B < C, N < B
    Conclusions ::
    I. D > N
    II. C ≥ K
    1. Only Conclusion I follows
    2. Only Conclusion II follows
    3. either Conclusion I or II follows
    4. neither Conclusion I nor II follows
    5. both Conclusion I and II follow

  1. View Hint View Answer Discuss in Forum

    Conclusions
    As per given question, we can draw the below conclusion,
    I. D > N           (✔)
         
    II. C ≥ K           (X)

    Correct Option: A

    Conclusions
    As per given question, we can draw the below conclusion,
    I. D > N           (✔)
         
    II. C ≥ K           (X)