RRB GROUP D QUANT QUIZ

Question 1:

What will be the compound interest on a sum of Rs. 50,000 at $12 \%$ p.a. for 6 months, if the interest is payable quarterly?

Rs.2,875

Rs.2,965

Rs.3,125

Rs.3,045

Question 2:

If the length and breadth of a rectangle are increased by $8 \%$ and $12 \%$ respectively, then by what percent will the area of that rectangle increase?

$20.96 \%$

$22 \%$

$24 \%$

$20 \%$

Question 3:

If the present age of $P$ is 15 years and after 6 years the age of $Q$ will be 26 years, then what is the ratio of their present ages?

4:1

$2: 3$

$2: 1$

$3: 4$

Question 4:

If the roots of the equation $x^{2}-x-1=0$ are $\alpha$ and $\beta$, then what is the equation whose roots are $\frac{\alpha}{\beta}$ and $\frac{\beta}{\alpha}$ ?

$x^{2}+x-1=0$

$x^{2}+3 x-1=0$

$x^{2}+3 x+1=0$

$x^{2}-x+1=0$

Question 5:

The square root of which of the following will be an irrational number?

11025

9025

6025

3025

Question 6:

$\frac{\sin A+\sin B}{\cos A-\cos B}+\frac{\cos A+\cos B}{\sin A-\sin B}=?$

$\sin A \cos B$

$\tan A \tan B$

0

$\cos A \cos B$

Question 7:

Which of the following is true?

$\frac{9}{16}>\frac{13}{24}$

$\frac{9}{16}=\frac{13}{24}$

$\frac{9}{16}<\frac{13}{24}$

Question 8:

If $a+b+c=5$ and $a^{3}+b^{3}+c^{3}-3 a b c=185$, then the value of $a b+b c+c a$ lies between:

-7 and 3

1 and 5

-3 and 1

5 and 9

Question 9:

A mixture contains wine and water in the ratio 5 : 1. On adding 10 litre of water, the ratio of wine to water becomes 5 : 3. The quantity of wine in the mixture is ?

20 litres

22 litres

24 litres

25 litres

Question 10:

What will come in the place of the question mark in the following number series?

$77,91,119,161$, ?

219

217

213

211