Staff Selection Commission Multi Tasking Staff Exam
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.
The Small Indian Mongoose, (1) ______ its little round ears, is an (2) ______ hunter and has a long snout-like face and short legs that have sharp claws. It (3) ______ brown or grey-grizzly fur and (4) ______ in abandoned burrows or tunnels. (5) ______ the rat-like appearance, mongooses are not rodents.
Question:
Select the most appropriate option to fill in the blank number 3.
Option 1: has
Option 2: had
Option 3: have
Option 4: having
Correct Answer: has
Solution : The correct choice is the first option.
Has is the correct present tense third-person singular auxiliary verb to be used in the sentence. This sentence conveys that the mongoose has brown or grey-grizzly fur.
Question : Directions: Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number. (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.) 2 : 6 :: 4 : 60 :: 7 : ?
Option 1: 600
Option 2: 105
Option 3: 201
Option 4: 336
Correct Answer: 336
Solution : Given: 2 : 6 :: 4 : 60 :: 7 : ?
To get the second number, subtract the first number from its cube. Like, 2 : 6→(2)3 – 2 = 8 – 2 = 6 4 : 60→(4)3 – 4 = 64
Question : Directions: In a certain code language, JPTM is written as 9421, MOST is written as 3279, and OPJB is written as 4617. What is S written in that code language?
Option 1: 7
Option 2: 9
Option 3: 3
Option 4: 2
Correct Answer: 3
Solution : Given: 1. JPTM ⇒ 9421 2. MOST ⇒ 3279 3. OPJB ⇒ 4617
By comparing all the above-coded letters, we find that – In words 1 and 2, M and T are the common letters and 9 and 2 are the common codes. In words
Question :
Blood pressure is controlled by
Option 1:
Adrenal gland
Option 2:
Thyroid gland
Option 3:
Thymus
Option 4: Corpus Luteum
Correct Answer:
Solution : The correct option is Adrenal gland.
The adrenal gland is involved in the control of blood pressure. The adrenal gland is responsible for manufacturing hormones that impact blood pressure, such as cortisol and aldosterone. Cortisol is a stress hormone that can raise blood pressure.
Question : A and B together can finish a work in 7.2 hours. If B alone can finish the same work in 18 hours, then A alone can do it in:
Option 1: 18 hours
Option 2: 12 hours
Option 3: 10 hours
Option 4: 15 hours
Correct Answer: 12 hours
Solution : Hourly work of A and B = $\frac{1}{7.2}$ Hourly work of B = $\frac{1}{18}$ Hourly work of A = $\frac{1}{7.2}-\frac{1}{18}$ = $\frac{10-4}{72}$ = $\frac{6}{72}$ $\therefore$ A alone can complete the work in $\frac{72}{6}=12$ hours Hence, the correct answer is 12 hours.
Question : Select the most appropriate synonym of the given word. Definite
Option 1: precise
Option 2: Ample
Option 3: Inclusive
Option 4: General
Correct Answer: precise
Definite is something that is fixed, certain, or clearly defined.
Precise means something that is sharp and accurate. Both of these words imply exactness, making them synonyms.
The meanings of the other options are as follows:
Question : The following bar graph shows the marks of a student from 5 different subjects in 2018 and 2019. Find the ratio of the total marks of 2018 to the total marks of 2019.
Option 1: 66 : 23
Option 2: 80 : 3
Option 3: 44 : 15
Option 4: 33 : 26
Correct Answer: 33 : 26
Solution : As per the graph, The total marks of 2018 = 33 + 60 + 70 + 55 + 46 = 264 The total marks of 2019 = 68 + 35 + 40 + 45 + 20 = 208 $\therefore$ Required ratio = $\frac{264}{208}$
Question : Anil is 12.5% more efficient than Sachin. If Sachin alone can finish a work in 10 days, then in how many days will Anil alone finish the same work?
Option 1: $\frac{80}{7}$ days
Option 2: $\frac{70}{9}$ days
Option 3: $\frac{80}{9}$ days
Option 4: $\frac{70}{11}$ days
Correct Answer: $\frac{80}{9}$ days
Solution : Time taken by Sachin to do the work = 10 days Efficiency of Sachin = $\frac{1}{10}$ Efficiency of Anil = $\frac{112.5}{100}$ × efficiency of Sachin = $\frac{112.5}{100}$ × $\frac{1}{10}$ = $\frac{112.5}{1000}$ = $\frac{9}{80}$ Time taken by Anil to do the work = $\frac{80}{9}$ days
Question : The value of [–11 + 2 – 12 ÷ 4] × 5 is:
Option 1: 84
Option 2: 17
Option 3: –12
Option 4: –60
Correct Answer: –60
Solution : [–11 + 2 – 12 ÷ 4] × 5 = [–11 + 2 – 3] × 5 = –12 × 5 = –60 Hence, the correct answer is –60.
Question : If the length of a rectangle is decreased by 13% and the breadth is increased by 13%, find the change of percentage in its area.
Option 1: 1.69% decrease
Option 2: 1.69% increase
Option 3: No change
Option 4: 13% decrease
Correct Answer: 1.69% decrease
Solution : Given, The length of a rectangle is decreased by 13% and the breadth is increased by 13% We know, For successive, increase or decrease = $x + y + \frac{xy}{100}$ Here $x$ = 13 and $y$ = –13 ⇒ $13 + (-13) + \frac{(13)(-13)}{100}=-\frac{169}{100}=-1.69$%
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