CGL MAINS SCORE BOOSTER QUANT QUIZ-6

Attempt now to get your rank among 38 students!

Question 1:

If $x^{4}+x^{2} y^{2}+y^{4}=21$ and $x^{2}+x y+y^{2}=3$, then what is the value of $8 x y$.

Question 2:

If $\sin ^{2} x+\sin x=1$, then what is the value of $\cos ^{12} x+3$ $\operatorname{cox}^{10} x+3 \cos ^{8} x+\operatorname{cox}^{6} x ?$

Question 3:

The total number of employees on three floors of building is 681. The number of employees on ground floor and first floor are in ratio $5: 7$ and those in first floor and second floor are in the ratio $9: 17$. Find the difference of the number of employees in the floor that had the highest number of employees to that of the lowest number of employes.

Question 4:

A pickpocket stole the wallet of Mr. Ashish. Ashish remembers that before he lost his wallet he bought a notebook and a marker. He paid $\frac{1}{10}$ th of his money for buying the notebook, and of the remaining, he spent $3.33 \%$ on buying marker which was equal to Rs. 18. Find the amount of money lost by Mr. Ashish.

Question 5:

A bike travels $\frac{1}{3}$ of the distance on a straight road with a speed of $10 \mathrm{~km} / \mathrm{h}$, the next $\frac{1}{3}$ with a speed of $20 \mathrm{~km} / \mathrm{h}$ and the last $\frac{1}{3}$ with a speed of $60 \mathrm{~km} / \mathrm{h}$. What is the average speed of the bike for the whole journey?

Question 6:

The average score in English of 82 students of class IX and class $\mathrm{X}$ was $64.25$. The number of students in class IX were 10 more than those in class $X$.The average score of students in class IX was $33.33 \%$ more than that of students in class $\mathrm{X}$. The average score of students in class IX is:

Question 7:

Train A takes 50 minutes more than train B to travel a distance of $420 \mathrm{~km}$. Due to engine trouble, speed of train $B$ falls by onethird, So it takes $30 \mathrm{~min}$ more than train A to complete the same journey what is the speed of train A?

Question 8:

CP of 15 apples is equal to SP of 12 apples. While the discount on 8 apples is equal to the profit earned on selling 6 apples. Find the difference between $\%$ of profit and discount?

Question 9:

In a square PQRS, $A$ and $B$ are two points on $P S$ and $S R$ such that $P A=2 A S$, and $R B=$ $2 \mathrm{BS}$. If $\mathrm{PQ}=6$, the area of the triangle $\mathrm{ABQ}$ is:

Question 10:

In two alloy, gold and silver are in the ratio of $3: 1$ and $5: 2 .$ After alloying together $8 \mathrm{~kg}$, of the first alloy, $21 \mathrm{~kg}$ of the second alloy and several killograms of pure silver, third alloy was obtained in which the ratio of silver to gold was $2: 3 .$ Find the weight of pure silver added. (in $\mathrm{kg}$ )