Correct Answer: 6

Solution : Required number of books in each stack = HCF of the given numbers of the three types of books. 
Now, 84 = 2 × 2 × 3 × 7,
90 = 2 × 3 × 3 × 5
and 120 = 2 ×2 × 2

Correct Answer:

Solution : Since there is a restriction on the rotation of the figure, we will check which of the option figures can exactly fit in the given question figure.
By comparison of all the option figures, only the fourth option figure is embedded in the given question figure.

Correct Answer: INR 17,136

Solution : Given:
a = 60 m
b = 112 m
c = 164 m
Rate = INR 8.50/m²
Now,
Semi perimeter, $(S) = \frac{60\ +\ 112\ +\ 164 }{2} =\ 168$
Area of the triangle 
$A\ = \sqrt{168(168\ -\ 60)(168\ -\ 112)(168\ -\ 164)}

Correct Answer: A decrease in the rate of inflation in a specific period.

Solution : The correct answer is A decrease in the rate of inflation in a specific period.

Disinflation is a decrease in the rate of inflation or a slowdown in the rate of increase in the

Correct Answer: 5%

Solution : When compounded annually, $ A= P(1+\frac{R}{100})^{T}$,
Where $A$ is the total amount, $P$ is the principal amount, $R$ is the rate of interest per annum, and $T$ is the time in years.
According to the question,
$⇒44100=40000(1+\frac{R}{100})^{2}$
$⇒(1+\frac{R}{100})^{2}=\frac{44100}{40000}$
$⇒(1+\frac{R}{100})^{2}=\frac{441}{400}$
$⇒\frac{R}{100}=\frac{21}{20}-1$
$⇒\frac{R}{100}=\frac{1}{20}$
$\therefore R=5\%$
Hence, the

Correct Answer: $6$

Solution : Given: $x^2-2\sqrt{10}x+1=0$
Dividing both sides by $x$, we get,
$⇒x-2\sqrt{10}+\frac{1}{x}=0$
$⇒x+\frac{1}{x}=2\sqrt{10}$
Squaring both sides, we get,
$⇒x^2+\frac{1}{x^2}+2×x×\frac{1}{x}=(2\sqrt{10})^2$
$⇒x^2+\frac{1}{x^2}=38$
Subtracting 2 from both sides, we get,
$⇒x^2+\frac{1}{x^2}-2=38-2$
$⇒x^2+\frac{1}{x^2}-2×x×\frac{1}{x}=36$
$⇒(x-\frac{1}{x})^2=36$
$\therefore x-\frac{1}{x}=\sqrt{36}=6$
Hence, the correct answer is $6$.

Correct Answer: 56

Solution : Given:
W = 46, BAT = 46

Multiply the sum of the positional value of the letters by 2 of BAT, to obtain the required code –
B→2; A→1; T→20
(2 + 1 + 20) × 2 = 23 × 2 = 46
And in,

Correct Answer: 425

Solution : The total marks scored by Ayush in all the subjects = 88 + 80 + 90 + 82 + 85 = 425
Hence, the correct answer is 425.

Correct Answer:

Solution : Whales, fishes, and crocodiles are all different types of animals found in water bodies. They all are inherently different based on their size, eating habits, and the type of water body in which they live, so all three circles will be separate from each other.

The

Correct Answer: Only conclusion I follows

Solution : The possible Venn diagram according to the given statements is as follows –

Let's analyse the conclusions –
Conclusion (I): All teas are cocktails – From the Venn diagram, it is evident that the circle representing tea is completely inside the circle