Tag: square root

The 2nd , 5th and 8th digit of the number 31549786 are 196 respectively.
196 is a perfect square of 14. 
Therefore, the even number required is 14.
Second digit of that number is 4.
Answer is 4

$\sqrt{\frac{16}{49}}=\frac{n}{49}$
$\Rightarrow \frac{4}{7}=\frac{n}{49}$
$\Rightarrow n=\frac{49\times 4}{7}=28$

$15^2=225,\;16^2=256$
$17^2=281\;18^2=324$
$19^2=361$
$\;2x-2+2x+2x+2=6(x)$
$\Rightarrow6x=324$ is possible
$\Rightarrow\sqrt{324}=18$

Given the area of the square is $441\ m^2$ .

Square root of unity is 1 and  -1 as $1^2={-1}^2=1$

To get inverse ( opposite operation) of squares. Division is opposite of Multiplication.

$13 \times 13 =169$ ( Square)

$169 \div 13 = 13$ ( Square root)

Therefore, B is the correct answer

Let $\sqrt{0.0169 \times x}=1.3$
Then,  $0.0169x = (1.3)^2 = 1.69$
$\Rightarrow x=\frac{1.69}{0.0169}=100$

$10a: \sqrt { 20a } \times \sqrt { 5a } =\sqrt{100{a}^{2}}=10a$

False

$\sqrt{10+\sqrt{25+\sqrt{121}}}$
$=\sqrt{10+\sqrt{15+11}}$
$=\sqrt{10+6}=\sqrt{16}=4$