RRB GROUP-D QUANT QUIZ

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Question 1:

A does $\frac{3}{5}$ of work in 12 days then B joined him and together they completed the remaining work in 5 days. In how many days can B alone finish $45 \%$ of the whole work?

Question 2:

Sonu saves $15 \%$ of her income. If her income increases by $20 \%$ and she still saves the same amount as before, then what is the percentage increase in her expenditure? (correct to one decimal place)

Question 3:

The expression $\frac{\left(x^{3}-1\right)\left(x^{2}-9 x+14\right)}{\left(x^{2}+x+1\right)\left(x^{2}-8 x+7\right)} $ simplifies to

Question 4:

The speed of motorboat in still water is $40 \mathrm{~km} /$ h. It travels $300 \mathrm{~km}$ downstream and then returns to the starting point. If the round trip takes a total of 16 hours. What is the speed of the stream of the river?

Question 5:

If $a+\frac{1}{a}=4$ Find the value of $a^{5}+\frac{1}{a^{5}}$

Question 6:

Two different trains of length $250 \mathrm{~m}$ and 150 $\mathrm{m}$ travelling with same speed cross the platform in 50 seconds and 40 seconds respectively. Find the length of the platform?

Question 7:

$\left(1+\frac{2}{3}\right) \div\left[\left(1+\frac{1}{3}\right) \div\left(\frac{2}{3}+1\right)\right]=?$

Question 8:

Value of ${ }^{8} \mathrm{c}_{1}+{ }^{8} \mathrm{c}_{2}+{ }^{8} \mathrm{c}_{3}+\cdots+{ }^{8} \mathrm{c}_{8}$ is.

Question 9:

In a triangle ABC , if $(s-b)(s-c)=s(s-a)$ then the angle $A$ is equal to

Question 10:

Find the median of given data :

12, 24, 18, 14, 26, 10, 14, 20, 28, 22.