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Question : $\triangle ABC$ is an isosceles triangle with AB = AC = 15 cm and an altitude from A to BC of 12 cm. The length of side BC is:
Option 1: 9 cm
Option 2: 12 cm
Option 3: 18 cm
Option 4: 20 cm
Correct Answer: 18 cm
Solution : Given: $\triangle ABC$ is an isosceles triangle with $AB = AC = 15$ cm. $AD \perp BC$ So, $AD = 12$ cm. Also, $BD = DC$. Using Pythagoras theorem in $\triangle ABD$, $(BD)^2=(AB)^2–(AD)^2$ $⇒BD=\sqrt{(AB)^2–(AD)^2}$ $⇒BD=\sqrt{(15)^2–(12)^2}$ $⇒BD=\sqrt{(15–12)(15+12)}$ $⇒BD=\sqrt{3\times27}$ $⇒BD=9$ cm $BC = 2 \times BD
Question : In what ratio sugar of Rs. 30 per kg should be mixed with sugar of Rs. 40 per kg so that the mixture is worth Rs. 37 per kg?
Option 1: 8 : 9
Option 2: 3 : 7
Option 3: 4 : 3
Option 4: 9 : 5
Correct Answer: 3 : 7
Solution : Let's assume that the ratio in which the two types of sugar are mixed is $x:y$ The cost of sugar of Rs. 30 per kg is 30$x$ The cost of sugar of Rs. 40 per kg is 40$y$ The mixture is worth Rs.
Question : Which of the following equations has equal roots?
Option 1: $3x^{2}-6x+2=0$
Option 2: $3x^{2}-6x+3=0$
Option 3: $x^{2}-8x+8=0$
Option 4: $4x^{2}-8x+2=0$
Correct Answer: $3x^{2}-6x+3=0$
Solution : An equation has equal roots if its discriminant is zero. The discriminant of a quadratic equation $ax^{2}+bx+c=0$ is given by $b^{2}-4ac$. Option (i): $3x^{2}-6x+2=0$ So, $D=(-6)^{2}-4×3×2=36-24$ $\therefore D=12$ > 0 Option (ii): $3x^{2}-6x+3=0$ So, $D=(-6)^{2}-4×3×3=36-36$ $\therefore D=0$ Option (iii): $x^{2}-8x+8=0$ So, $D=(-8)^{2}-4×1×8=64-32$ $\therefore D=32$ >
Question : ______ has become the 65th Indian Grandmaster at the age of 13.
Option 1: Prithu Gupta
Option 2: Raunak Sadhwani
Option 3: Rahul Vaid
Option 4: R. Praggnanandhaa
Correct Answer: Raunak Sadhwani
Solution : The correct answer is Raunak Sadhwani.
Raunak Sadhwani became the 65th Indian Grandmaster at the age of 13 years. The Grandmaster is the title award for the chess player by the world chess organisation FIDE (Federation Internationale des Echecs or International Chess Federation).
Question : What did John Boyd Dunlop invent?
Option 1: Pneumatic rubber tyre
Option 2: Car music system
Option 3: Steering wheel
Option 4: Diesel engine
Correct Answer: Pneumatic rubber tyre
Solution : The correct option is a Pneumatic rubber tyre.
The pneumatic rubber tyre is said to have been invented by John Boyd Dunlop. Dunlop invented the first workable pneumatic tyre for bicycles in 1887. He placed an air-filled rubber tube around a bicycle
Question : In $\Delta ABC$ the straight line parallel to the side $BC$ meets $AB$ and $AC$ at the point $P$ and $Q,$ respectively. If $AP=QC$, the length of $AB$ is $\operatorname{12 units}$ and the length of $AQ$ is $\operatorname{2 units}$, then the length (in units) of $CQ$ is:
Option 1: $4$
Option 2: $6$
Option 3: $8$
Option 4: $10$
Correct Answer: $4$
Solution :
Given that $AP=QC$, $AB=\operatorname{12 units}$ and $AQ=\operatorname{2 units}$ Let $AP=QC=x\operatorname{ units}$ Since $PQ$ is parallel to $BC$, then, $\Delta ABC\sim\Delta APQ$ Since the triangles are similar, the ratios of their corresponding sides are equal. $\frac{AP}{AB}=\frac{AQ}{AC}$ ⇒ $\frac{x}{12}=\frac{2}{2+x}$ ⇒ $2x+x^2=24$ ⇒ $x^2+2x-24=0$ ⇒ $(x+6)(x-4)=0$ ⇒ $x=4$
Question : The following pie chart shows the percentage distribution of the expenditure incurred in publishing a book. Expenditure Find the paper cost, if the royalty is INR 22,500.
Option 1: INR 32,500
Option 2: INR 37,500
Option 3: INR 30,000
Option 4: INR 33,000
Correct Answer: INR 37,500
Solution : Royalty = 15% and Paper cost = 25% So, 15% is equivalent to INR 22,500 Therefore, 25% is equivalent to $(22500×\frac{25}{15})$ = INR 37,500 Hence, the correct answer is INR 37,500.
Question : In February 2022, Cabinet approved implementation of Ayushman Bharat Digital Mission. Which ministry of central government launched the Ayushman Bharat Yojana across the country?
Option 1: Ministry of Education
Option 2: Ministry of Ayush
Option 3: Ministry of Health and Family Welfare
Option 4: Ministry of Women and Child Development
Correct Answer: Ministry of Health and Family Welfare
Solution : The correct answer is the Ministry of Health & Family Welfare.
The Ayushman Bharat Digital Mission was implemented by the Ministry of Health & Family Welfare. This mission aims to create unique account numbers for its citizens. The mission
Question : Comprehension:
In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.
Nature has been suffering mutely for hundreds of years but the problem did not (1)______ serious proportions so long as the damage was (2)______ and not beyond self-repair. These limits were crossed with (3)______ technological breakthroughs accomplished during the recent years. The developed nations (4)______ benefitted most from these were the first to (5)______ the environmental diseases bred by advanced technology.
Question:
Select the most appropriate option to fill in the blank 1.
Option 1: receive
Option 2: grasp
Option 3: become
Option 4: assume
Correct Answer: assume
Solution : The correct choice is the fourth option.
Assume means supposed to be the case, without proof. It helps convey that nature has been suffering mutely for hundreds of years but the problem was not addressed until now.
Question : Select the most appropriate option to fill in the blank. I will be joining the office ____ a week's time.
Option 1: by
Option 2: in
Option 3: at
Option 4: during
Correct Answer: in
Solution : The correct choice is the second option.
Explanation: The preposition "in" is the correct choice to indicate the duration within which the action will take place. In this context, it signifies that the person will be joining the office within the time span of
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