SSC CGL MATHS QUIZ-20

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Question 1:

If $x=\frac{\sqrt{3}-\sqrt{2}}{\sqrt{3}+\sqrt{2}}$ and $y=\frac{\sqrt{3}+\sqrt{2}}{\sqrt{3}-\sqrt{2}}$, then the value $x^{3}+y^{3}$ is:

Question 2:

Simplify the expression $45-[36-\{29-(25-\overline{7+4})\}]$.

Question 3:

In an examination marks secured by Amit is $18 \frac{3}{4} \%$ more than the marks secured by Ajit, Adity secured $25 \%$ more marks than Amit. If total marks secured by them taken together is 705 , then find the marks secured by Ajit.

Question 4:

In a school with 600 students, the average age of the boys is 12 years and that of the girls is 11 years. If the average age of the school is 11 years and 9 months, then the number of girls in the school is

Question 5:

After allowing a discount of $10 \%$ on the marked price of an article, it is sold for Rs. 450 . Had the discount not been given, the profit would have been $25 \%$. What is the $50 \%$ of the cost price (in Rs.) of the article?

Question 6:

A right circular cylindrical shape of length $14 \mathrm{~cm}$ is in the center of a solid object. One end of the solid is a right circular cone and the other end is a hemisphere. The radius of all the three shapes is $3 \mathrm{~cm}$. If the total length of the solid object including the cone and the hemisphere is $21 \mathrm{~cm}$, then find the area of the solid object in cubic $\mathbf{c m}$.

Question 7:

Karan borrowed a certain sum from the bank. The bank charges a simple interest of 15 % per annum. Karan later realized that he no longer needs the entire money. So he lent 70% of the borrowed sum to Arjun at the rate of 20% per annum compounded annually. At the end of 3 years, Arjun paid him a sum of Rs. 1814400.How much amount(in Rs.) will Karan pay to the bank if he repays the entire loan at the end of 4 years?

Question 8:

A vessel is filled with a liquid, 3 parts of which are water and 5 parts syrup. How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half syrup?

Question 9:

In the given figure, $O$ is the center of the circle. Its two chords $A B$ and $C D$ intersect each other at the point $P$ within the circle. IF $A B=30 \mathrm{~cm}, P B=18 \mathrm{~cm}$ $C P=6 \mathrm{~cm}$, then the length of $P D$?

Question 10:

Let $\triangle \mathrm{ABC} \sim \triangle \mathrm{RPQ}$ and $\frac{\operatorname{ar}(\triangle \mathrm{ABC})}{\operatorname{ar}(\triangle \mathrm{PQR})}=\frac{4}{9}$. If $\mathrm{AB}=3 \mathrm{~cm}, \mathrm{BC}=4 \mathrm{~cm}$ and $\mathrm{AC}=5 \mathrm{~cm}$, then $\mathrm{PQ}$ (in $\mathrm{cm}$ ) is equal to: