Staff Selection Commission Combined Graduate Level Exam
Question : Directions: Choose one of the following correct combinations of mathematical signs that can be filled sequentially to balance the following equation.
Option 1: ÷, ×, –, =, ×
Option 2: ÷, ×, =, +, +
Option 3: ÷, ×, +, =, –
Option 4: +, =, ÷, ×, +
Correct Answer: ÷, ×, +, =, –
Solution : Given:
Let's check the given options – First option: ÷, ×, –, =, × ⇒ 28 ÷ 4 × 3 – 9 = 42 × 12 Solving the L.H.S. of the equation – = 28 ÷ 4 × 3 – 9
Question : Select the most appropriate ANTONYM of the underlined word. The soldiers were irresolute and so, they won the war for the infantry and the country.
Option 1: harsh
Option 2: variant
Option 3: default
Option 4: decisive
Correct Answer: decisive
Solution : The fourth option is correct.
The underlined word irresolute in the sentence implies a lack of determination or firmness in making decisions. It describes individuals who are hesitant, indecisive, or uncertain. On the other hand, the antonym decisive refers to the ability to make decisions
Question : ______ gas is used for the manufacturing of bleaching powder.
Option 1: Nitrogen
Option 2: Sulphur
Option 3: Oxygen
Option 4: Chlorine
Correct Answer: Chlorine
Solution : The correct option is Chlorine.
Bleaching powder (calcium hypochlorite) Ca(ClO)2 is made using chlorine gas (Cl2). A crucial component of bleaching powder used extensively in many industries as a bleaching agent, water treatment method, and disinfectant is chlorine gas.
Question : A is 50% more efficient than B. B finished the same work in 20 days. If A and B worked together, then how much time would they take to finish the same work?
Option 1: 10 days
Option 2: 7 days
Option 3: 8 days
Option 4: 9 days
Correct Answer: 8 days
Solution : Let the efficiency of B be 100. So, the efficiency of A = 100 + 50 =150 The efficiency ratio of A and B = 150 : 100 = 3 : 2 Total efficiency = 3 + 2 = 5 units The time taken
Question : Select the most appropriate option that can substitute the underlined segment in the given sentence. Unemployment has become a fiery question of the day.
Option 1: become a burning question
Option 2: become a freezing question
Option 3: become a furious question
Option 4: become a flaming question
Correct Answer: become a burning question
Solution : The first option is the correct choice.
In the sentence provided, the phrase implies that unemployment is a significant and urgent issue that is being highlighted or emphasised.
Burning question is an idiomatic expression that signifies an urgent or pressing issue demanding
Question : a3 + b3 + c3 = 3abc if _________.
Option 1: a = b = c
Option 2: a + b + c = 0
Option 3: a + b + c = 1
Option 4: a + b + c = –1
Correct Answer: a + b + c = 0
Solution : We know that a3 + b3 + c3 = (a + b + c) (a2 + b2 + c2 – ab – bc – ca) + 3abc So, a3 + b3
Question : Directions: Select the option that represents the letters that, when sequentially placed from left to right in the blanks below, will complete the letter series. C _ _ SRCNP _ _ _ N _ SRC _ PS _
Option 1: PSNRCPNR
Option 2: NPSRCPRN
Option 3: NPSRPCRN
Option 4: NPSRCPNR
Correct Answer: NPSRCPNR
Solution : Given: C _ _ SRCNP _ _ _ N _ SRC _ PS _
To fill the series we have to divide the series – C _ _ SR / CNP _ _ / _ N _ SR / C _ PS _
Let's check
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. After retirement Surti lived ____ Australia.
Option 1: in
Option 2: at
Option 3: over in
Option 4: over at
Correct Answer: in
Solution : The correct choice is the first option.
Explanation: When describing someone's place of residence, we use "in" before the country or city. In this context, "in Australia" means that Surti lived within the country of Australia.
The meanings of the other prepositions are as follows:
Question : Select the most appropriate option that can substitute the underlined segment in the given sentence. They decided to have a meeting to discuss about the project.
Option 1: to discuss through the project
Option 2: to discuss the project
Option 3: to discuss over the project
Option 4: to discuss beyond the project
Correct Answer: to discuss the project
Solution : The correct choice is the second option.
Explanation: The phrase "to discuss about the project" contains an unnecessary preposition "about" after "discuss". The verb discuss doesn't need an additional preposition like "about" in this context. It's more concise and grammatically correct
Question : The average mark obtained in a class of 50 students is 70%. The average of the first 25 is 60% and that of 24 is 80%. What were the marks obtained by the last student?
Option 1: 90%
Option 2: 60%
Option 3: 80%
Option 4: 70%
Correct Answer: 80%
Solution : Average marks of 50 students = 70% Total percentage of marks of 50 students = 50 × 70% = 3500% Average of first 25 students = 60% Total percentage of marks of 25 students = 25 × 60% = 1500% Average marks of the next
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