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Mathematical Operations

Important Instructions
61.

 

What is 7 + 7 ÷ 7 + 7 × 7 − 7 =

Answer: C

Given 7 + 7/7 + 7 x 7 - 7

By using BODMAS rule,

7 + 1 + 7 x 7 - 7

= 8 + 49 - 7

= 57 - 7

= 50.

 

Hence 7 + 7/7 + 7 x 7 - 7 = 50.

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62.

If the given interchanges namely : signs + and + and numbers 2 and 4 are made in signs and numbers, which one of the following four equations would be correct?

Answer: D

No answer description available for this question.

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63.

If 18 (9) 3 and 36 (30) 5, then what is the value of A in 19 (A) 18?

Answer: B

No answer description available for this question.
 

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64.

5x - 6 = 3x - 8

Solve the above equation.

Answer: B

Given 5x - 6 = 3x - 8

5x - 3x = -8 + 6

2x = -2

=> x = -1.

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65.

 

X⊃2;+X⊃2; =

Answer: C

Here the given expression, 

X⊃2; + X⊃2;  is an algebraic expression. Here in this expression the terms are like terms. Now to add them, add their coefficients.

Here in the given expression, the like terms are two X⊃2; 

Hence, adding their coefficients i.e, 1 + 1 = 2

Therefore, 

 

X⊃2; + X⊃2; = 2X⊃2;.

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66.

If "–" means "added to", "+" means "divided by", "÷" means "multiplied by", "x" means "subtracted from", then 13 + 12 x 9 ÷ 3 – 6 = ?

Answer: D

No answer description available for this question.
 

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67.

Select the correct set of symbols which will fit in the given equation?

5  0  3  5 = 20

Answer: B

Clearly 5 - 0 + 3 X 5 = 20

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68.

If "+" means "minus", "x" means "divided by", "÷" means "plus" and "-" means "multiplied by", then 38 x 2 – 6 + 19 ÷ 35 = ?

Answer: A

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69.

The solution of 3(2u + v) = 7 uv and 3(u + 3v) = 11 uv is _____

Answer: B

Using Trial and error method,

From the options  u = 1, v = 3/2 satisfies both the equations.

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70.

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
24 x 6 - 8 + 2 = ?

Answer: D

No answer description available for this question.
 

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