When 3888 is divided by the square of a n… | Answer | TuitionWave

Subject

Quantitative Aptitude

Topic

Algebra

When 3888 is divided by the square of a number and the answer so obtained in multiplied by 21, the final answer obtained is 252. What is the number?
Reading

ক)

324

খ)

16

গ)

256

ঘ)

144

ঙ)

None of these

Explanation

Let the no. be x According to question

\begin{array}{l} \Rightarrow \frac{{3888}}{{{x^2}}} \times 21 = 252\\ \Rightarrow \frac{{3888}}{{252}} \times 21 = {x^2}\\ \Rightarrow \frac{{81648}}{{252}} = {x^2} \end{array}

= x 2 = 324 Square rooting both sides We get, x = 18

\frac{a}{3} = \frac{b}{4} = \frac{c}{7}

then what would be the value of

\frac{{a + b + c}}{a}

?Multiplication and difference of two numbers are 93 and 28 respectively. Find the difference of reciprocals of the numbers.if

{P^2} + {1 \over {{P^2}}} = 7

, then find the value of

{P^2} - {1 \over {{P^2}}}.

In following question, two equations are given, you have to solve them and choose the correct option: x2– 3x – 4 = 0, y2– 4 = 0 In following question, two equations are given, you have to solve them and chose the correct option: x2+ 11x + 30 = 0, y2+ 7y + 12 = 0 In the following question, one or two equation(s) is/are given. You have to solve both the equations and find the relation between ‘l’ and ‘m’ and mark correct answer. I. (125)1/3l – (1331)1/3= 4 × (729)1/6+ (1024)1/10II. (m)2– (15625)1/3= 0 Direction: In the following question two equations numbered I and II are given. You have to solve both the equations and give answers:I: x - √121 = 0 II: y2- 121 = 0 The number of solutions of x2+ 4|x| + 5 = 0 is

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