Staff Selection Commission Sub Inspector Exam
Question : The LCM of the two numbers is 840 and their HCF is 7. If one of the numbers is 56, find the other.
Option 1: 120
Option 2: 112
Option 3: 105
Option 4: 84
Correct Answer: 105
Solution : Given that the LCM is 840, the HCF is 7 and one of the numbers is 56. Let the other number be $x$. We know, LCM × HCF = Number1 × Number2 Substituting the given values into the equation: $⇒840 × 7 = 56 ×
Question : The largest forest which covers 25 per cent of the world's forest land is:
Option 1: The Tropical Rain Forest
Option 2: Taiga Forest of Siberia
Option 3: Monsoon Forest
Option 4: Temperate Forests of Europe
Correct Answer: Taiga Forest of Siberia
Solution : The correct option is the Taiga Forest of Siberia.
The Taiga forest in Siberia is the world's largest forest, covering 25% of all forest area. Taigas are found in Siberia, Alaska, Canada, and Scandinavia. These forests are covered in dense vegetation. Coniferous
Question : Directions: Select the Venn diagram that best illustrates the relationship between the following classes. Car drivers, Human beings, Men
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution : Given: Car drivers, Human beings, Men
Car drivers include both men and women, and all car drivers are human beings. Men represent a subset of human beings, and some of them may be car drivers.
Therefore, the Venn diagram will be as follows –
Hence, the
Question : Directions: In the given figure, which alphabet represents gel pens that are not blue?
Option 1: c
Option 2: d
Option 3: h
Option 4: b
Correct Answer: c
Solution : In the below diagram, the shaded part in the diagram represents gel pens that are not blue.
Therefore, the alphabet that represents gel pens that are not blue is c. Hence, the first option is correct.
Question : Abhijit Vinayak Banerjee was awarded the 2019 Nobel Memorial Prize in:
Option 1: Literature
Option 2: Economics
Option 3: Chemistry
Option 4: Physics
Correct Answer: Economics
Solution : The correct answer is Economics.
Abhijit Vinayak Banerjee is a renowned economist, and he was awarded the Nobel Memorial Prize in Economic Sciences. In 2019, the Nobel Prize for economics was given to Abhijeet Vinayak Banerjee and his wife, Esther Duflo and Michael Kremer,
Question : The difference between the value of the number increased by 20% and the value of the number decreased by 25% is 36. Find the number.
Option 1: 7.2
Option 2: 0.8
Option 3: 720
Option 4: 80
Correct Answer: 80
Solution : Let the number be $100x$. According to the question, The difference between the number increased and the number decreased is 36. ⇒ $120x - 75x = 36$ ⇒ $45x = 36$ $\therefore x = \frac{4}{5}$ So, the number $=100x=\frac{4}{5} × 100 = 80$ Hence, the
Question : If three numbers are in the ratio of 1 : 3 : 7, and their LCM is 336, then their HCF is:
Option 1: 16
Option 2: 18
Option 3: 10
Option 4: 12
Correct Answer: 16
Solution : Three numbers are in the ratio of $1 : 3 : 7$. Let the numbers be $x, 3x, 7x$. Their LCM = $21x$ According to the question, $21x = 336$ $\therefore x = 16$ So, the numbers are 16, 16 × 3 = 48, 16
Question : Directions: Seven people, A, B, C, D, E, F, and G, are sitting in a straight row, facing north (not necessarily in the same order). Only 1 person sits to the left of D. A is an immediate neighbour of D. Only 2 people sit between F and D. Only 3 people sit between C and G. B is not an immediate neighbour of G. Only 2 people sit between E and A. Who sits at the extreme right end of the row?
Option 1: A
Option 2: G
Option 3: C
Option 4: B
Correct Answer: C
Solution : Given: (I) Seven people, A, B, C, D, E, F, and G, are sitting in a straight row, facing north. Only 1 person sits to the left of D. A is an immediate neighbour of D. Only 2 people sit between F and D.
(II)
Question : Find the HCF of $\frac{11}{25}, \frac{9}{20}, \frac{16}{15}$, and $\frac{10}{33}$.
Option 1: $\frac{1}{3300}$
Option 2: $\frac{1}{330}$
Option 3: $\frac{1}{33}$
Option 4: $\frac{1}{300}$
Correct Answer: $\frac{1}{3300}$
Solution : The highest common factor (HCF) of fractions is calculated as the HCF of the numerators divided by the least common multiple (LCM) of the denominators. The numerators of the given fractions are 11, 9, 16, and 10. The HCF of these numbers is 1. The
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.
It was a cool and windy day. Shiela, Zora, Lamba and I were (1)_______ our way to the Park to play on the slides. On our way (2)_______, Shiela (3)_______ something stuck to her shoe. "Must be a (4)_______ of chewing gum or something," she muttered as she (5)_______ down to remove the object. What she removed from her shoe was a dirty note of five hundred rupees!
Question:
Select the most appropriate option to fill in the blank 3.
Option 1: thought
Option 2: felt
Option 3: found
Option 4: had
Correct Answer: felt
Solution : The correct choice is the second option.
Explanation:
In this context, the preposition on is the most suitable choice. The sentence would read, "Shiela, Zora, Lamba, and I were on our way to the park to play on the slides". The preposition on indicates the
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