Staff Selection Commission Combined Graduate Level Exam
Question : Let $0^{\circ}<\theta<90^{\circ}$, $\left(1+\cot ^2 \theta\right)\left(1+\tan ^2 \theta\right) × (\sin \theta-\operatorname{cosec} \theta)(\cos \theta-\sec \theta)$ is equal to:
Option 1: $ \sin \theta+\cos \theta$
Option 2: $\sin \theta \cos \theta$
Option 3: $\sec \theta \operatorname{cosec} \theta$
Option 4: $\sec \theta+\operatorname{cosec} \theta$
Correct Answer: $\sec \theta \operatorname{cosec} \theta$
Solution : $\left(1+\cot ^2 \theta\right)\left(1+\tan ^2 \theta\right) × (\sin \theta-\operatorname{cosec} \theta)(\cos \theta-\sec \theta)$ $=\operatorname{cosec}^2\theta×\sec^2\theta(\sin\theta-\frac{1}{\sin\theta})(\cos\theta-\frac{1}{\cos\theta})$ [$\because 1+\cot ^2 \theta=\operatorname{cosec}^2\theta$ and $1+\tan ^2 \theta=\sec^2\theta$] $=\frac{1}{\sin^2\theta}×\frac{1}{\cos^2\theta}(\frac{\sin^2\theta-1}{\sin\theta})(\frac{\cos^2\theta-1}{\cos\theta})$ $=\frac{1}{\sin^2\theta}×\frac{1}{\cos^2\theta}(\frac{-\cos^2\theta}{\sin\theta})(\frac{-\sin^2\theta}{\cos\theta})$ $=\sec \theta \operatorname{cosec} \theta$ Hence, the correct answer is $\sec \theta \operatorname{cosec} \theta$.
Question : Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph. A. But, while the court's action solved one problem, it created another and because of the closure, many workers lost their jobs. B. For instance, the courts directed industries in residential areas in Delhi to close down or shift out of the city. C. In recent years, while the courts have come out with strong orders on environmental issues, these have sometimes affected people's livelihoods adversely. D. Several of these industries were polluting the neighbourhood and discharge from these industries was polluting the river Yamuna because they had been set up without following the rules.
Option 1: CBDA
Option 2: BDCA
Option 3: CDAB
Option 4: BCAD
Correct Answer: CBDA
Solution : The correct choice is the first option.
Sentence (C) introduces the theme of recent strong court orders on environmental issues, highlighting their adverse effects on people's livelihoods.
Sentence (B) provides an example of such orders, where industries in residential areas of Delhi were directed to
Question : If $\cos \theta=\frac{12}{13}$, then the value of $\frac{\sin \theta(1-\tan \theta)}{\tan \theta(1+\operatorname{cosec} \theta)}$ is:
Option 1: $\frac{25}{78}$
Option 2: $\frac{35}{234}$
Option 3: $\frac{35}{108}$
Option 4: $\frac{25}{156}$
Correct Answer: $\frac{35}{234}$
Solution : Given: $\cos \theta=\frac{12}{13}$ We know that, $\cos \theta=\frac{\text{Base}}{\text{Hypotenuse}}=\frac{12}{13}$ Using Pythagoras theorem, we get, Perpendicular = $\sqrt{13^2-12^2}=5$ $\sin \theta=\frac{\text{Perpendicular}}{\text{Hypotenuse}}=\frac{5}{13}$ $\tan \theta=\frac{\text{Perpendicular}}{\text{Base}}=\frac{5}{12}$ $\operatorname{cosec} \theta=\frac{1}{\sin \theta}=\frac{13}{5}$ Now, $\frac{\sin \theta(1-\tan \theta)}{\tan \theta(1+\operatorname{cosec} \theta)}$ $= \frac{\frac{5}{13}(1-\frac{5}{12})}{\frac{5}{12}(1+\frac{13}{5})}$ $= \frac{\frac{5}{13}\times \frac{7}{12}}{\frac{5}{12}\times \frac{18}{5}}$ $=\frac{35}{234}$ Hence, the correct answer is $\frac{35}{234}$.
Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it. First row – 15, 11, 43 Second row – 13, 8, 48 Third row – 9, 7, ? (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying, etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is NOT allowed.)
Option 1: 23
Option 2: 30
Option 3: 27
Option 4: 26
Correct Answer: 23
Solution : Given: First row – 15, 11, 43 Second row – 13, 8, 48 Third row – 9, 7, ?
Like, (15 – 11) × 8 = 4 × 8 = 32; 32 + 11 = 43 (13 – 8) × 8 = 5 × 8
Question : Directions: A # B means A is the brother of B. A @ B means A is the daughter of B. A & B means A is the husband of B and A % B means A is the wife of B. If D @ N @ H & Y @ F % V, then how is N related to F?
Option 1: Daughter's daughter
Option 2: Daughter
Option 3: Sister's daughter
Option 4: Son's wife
Correct Answer: Daughter's daughter
Solution : As per the given information, the family tree will be as follows – Here, the quadrilateral represents the male, and the circular figure represents the female in the figure.
So, from the above family tree, N is the daughter's daughter (granddaughter) of F. Hence,
Question : Comprehension: In the given passage, some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each number.
In August every year, thousands of twins descend on a town in Ohio called Twinsburg, named by identical twin brothers 1.________ two centuries ago. The Twins Days Festival is a three-day 2.________ consisting of talent shows and look-alike 3.__________ that has become one of the world's 4.___________ gatherings of twins. There have been 5.____________festivals in Nigeria, a country where 1 in 22 births to the Yoruba people 6.____________ twins, identical or fraternal, which is a much higher 7. ___________than anywhere else in the world. This has been 8.___________ to the eating of yams, but the theory is 9.__________ Biomedical researchers attend these events, regarding them as a 10.____________ opportunity to conduct surveys and experiments.
Question: Select the most appropriate option to fill in the blank No. 8.
Option 1: attributed
Option 2: indicated
Option 3: dedicated
Option 4: distributed
Correct Answer: attributed
Solution : The first option is the correct answer.
We can say that the implied meaning of the sentence is that the birth of twins to the Yoruba people is the result of the people's habit of eating yams. According to the above-mentioned points, the most appropriate
Question : Directions: Select the option that represents the correct order of the given words as they would appear in the English dictionary. 1. Warriors 2. Warehouse 3. Warcraft 4. Warranty 5. Wardrobe 6. Wardenship
Option 1: 3, 6, 5, 2, 1, 4
Option 2: 3, 5, 6, 2, 1, 4
Option 3: 3, 5, 6, 2, 4, 1
Option 4: 3, 6, 5, 2, 4, 1
Correct Answer: 3, 6, 5, 2, 4, 1
Solution : Given: 1. Warriors 2. Warehouse 3. Warcraft 4. Warranty 5. Wardrobe 6. Wardenship
Step 1: The first, second, and third letters of all the words are the same, so move on to the next letter. Step 2: The fourth letter
Question : Directions: In the following question, a sentence is given with a blank that is to be filled in with an appropriate word. Four alternatives are suggested; choose the correct alternative out of them as your answer.
He completed all projects on time except for two of them which he found too difficult to ________.
Option 1: Embrace
Option 2: Comprehend
Option 3: Acknowledge
Option 4: Discern
Correct Answer: Comprehend
Solution : To complete the sentence correctly, we need a word that indicates that the person found those two projects too difficult to understand or grasp. The word "comprehend" means to understand fully or grasp the meaning of something.
So, the correct sentence is: "He completed all
Question : The value of $\operatorname{cosec}^{2}60°+\sec^{2}60°– \cot^{2}60°+\tan^{2}30°$ will be:
Option 1: $5$
Option 2: $5\frac{1}{2}$
Option 3: $5\frac{1}{3}$
Option 4: $5\frac{2}{3}$
Correct Answer: $5\frac{1}{3}$
Solution : Given: $\operatorname{cosec}^{2}60°+\sec^{2}60°– \cot^{2}60°+\tan^{2}30°$ We know that $\operatorname{cosec60°} = \frac{2}{\sqrt{3}}$ $\sec 60° = 2$ $\cot 60° = \frac{1}{\sqrt{3}}$ $\tan 30° = \frac{1}{\sqrt{3}}$ Substituting these values in the given expression, we get: = $(\frac{2}{\sqrt{3}})^{2} + 2^{2} – (\frac{1}{\sqrt{3}})^{2} +(\frac{1}{\sqrt{3}})^{2}$ = $\frac{4}{3}+4=\frac{16}{3}= 5\frac{1}{3}$ Hence, the correct answer is
Question : Directions: Select the figure from among the given options that can replace the question mark (?) in the following series.
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution : According to the given figures – 1. The letters at the top right corner are increased by 2. 2. The letters at the bottom right corner are increased by 3.
3. The letters at the top left corner are increased by 1. 4. The letters at
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