RRB GROUP D QUANT QUIZ

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Question 1:

If ' $a$ ' is a natural number, then $\left(7 a^{2}+7 a\right)$ is always divisible by -

Question 2:

The possible number of $(a, b, c)$ where $\mathrm{a}, \mathrm{b}, \mathrm{c}$ are positive integers such that $\mathrm{abc}=30$ is:

Question 3:

The chance of throwing a total of 5 or 12 with two dice is:

Question 4:

If $x-y=4$ and $x^{3}-y^{3}=784$ then the value of $\sqrt{\frac{x^{2}+y^{2}}{4}}$ is $?$

Question 5:

A cistern can be filled by two pipes $A$ and $B$ in 4 and 6 h respectively. Whereas the filled cistern can be emptied by a third pipe $C$ in $8 h$. If all the pipes are opened together, then how much time will be taken to fill the reservoir completely?


Question 6:

What is the cost of leveling a triangular piece of land whose sides are $72 \mathrm{~m}$, $30 \mathrm{~m}$ and $78 \mathrm{~m}$ respectively at the rate of 20 paise per square metre?

Question 7:

Find the difference between the largest 5-digit number and the smallest 4-digit number.

Question 8:

Free notebooks were distributed equally among the children of a class. The number of notebooks each child got was $1 / 8 t h$ of the number of children. Had the number of children been half, each child would have got 16 notebooks. How many notebooks were distributed in total?

Question 9:

X gets on an elevator at the 11th floor of a building and rides up at th erate of 57 floors per minute. At the same time, $Y$ gets on an elevator at the 51 st floor of the same building and rides down at the rate of 63 floors per minute. If they continue travelling at these rates, then at which floor will their paths cross?

Question 10:

$\sin ^{2} 60^{\circ}+\cos ^{2} 30^{\circ}+\cot ^{2} 45^{\circ}+\sec ^{2} 60^{\circ}=?$