Staff Selection Commission Sub Inspector Exam
Question : Which one of the following has a maximum tendency to form M3 ion?
Option 1: N
Option 2: Bi
Option 3: P
Option 4: As
Correct Answer: N
Solution : The correct option is N (Nitrogen).
Nitrogen has the highest electronegativity value, which means that it is the most electronegative element in the group. This means that it is more likely to attract electrons and form an ionic bond with a metal.
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. 9 : 102 :: 11 : 146 :: 13 : ?
Option 1: 198
Option 2: 200
Option 3: 175
Option 4: 171
Correct Answer: 198
Solution : Given: 9 : 102 :: 11 : 146 :: 13 : ?
Add 1 to the given number and then find the square of the resultant number and add 2 to obtain the missing term – Here, 9 : 102→(9 + 1)2 + 2 = (10)2 + 2 = 100 + 2 = 102 And, 11 : 146→(11 + 1)2 + 2 = (12)2 + 2 = 144 + 2 = 146 Similarly, follow the same pattern for 13; (13 + 1)2 + 2 = (14)2 + 2 = 196 + 2 = 198
So, 198 is the missing number in the given pair of numbers. Hence, the first option is correct.
Question : Directions: In a certain code language, GARDEN is written as OFESBH, and LADDER is written as SFEEBM. How will HANDLE be written in that language?
Option 1: FMDOBI
Option 2: FMEOBI
Option 3: FMGOBI
Option 4: FMFOBI
Correct Answer: FMEOBI
Solution : Given: GARDEN is written as OFESBH and LADDER is written as SFEEBM.
Add 1 to the place value of each letter of GARDEN and LADDER and then reverse the order of the letters to get the required code.
So, GARDEN is written as OFESBH.
So, LADDER is written as SFEEBM. Similarly, follow the same pattern for HANDLE –
So, HANDLE is written as FMEOBI. Hence, the second option is correct.
Question : The given histogram represents the frequency distribution of average runs scored by 50 selected players from a district in a local cricket tournament.
How many players scored more than 30.5 on average?
Option 1: 28
Option 2: 34
Option 3: 12
Option 4: 16
Correct Answer: 34
Solution : As per the graph, The number of players who scored more than 30.5 on average = 12 + 16 + 4 + 2 = 34 Hence, the correct answer is 34.
Question : Europa is a natural satellite of:
Option 1: Uranus
Option 2: Mars
Option 3: Jupiter
Option 4: Saturn
Correct Answer: Jupiter
Solution : The correct answer is Jupiter.
Europa is a natural satellite of Jupiter. The name of this natural satellite is named after Europa, the Phoenician mother of King Minos of Crete and lover of Zeus. Europa orbits Jupiter every 3.5 days and is locked by gravity to Jupiter, so the same hemisphere of the moon always faces the planet. Jupiter takes about 4333 Earth days or about 12 Earth years to orbit the Sun.
Question : Which among the following is the name given to the cursor for the computer language 'LOGO'?
Option 1: Robot
Option 2: Frog
Option 3: Spider
Option 4: Turtle
Correct Answer: Turtle
Solution : The correct answer is Turtle.
A turtle is a graphical object that indicates the LOGO program's current location and orientation. LOGO instructions may be used to move and rotate the turtle. As it travels, the turtle may also create lines and shapes.
Question : Let A and B be two towers with the same base. From the midpoint of the line joining their feet, the angles of elevation of the tops of a and b are 30o and 45o, respectively. The ratio of the heights of A and B is:
Option 1: $1: 3$
Option 2: $1: \sqrt{3}$
Option 3: $\sqrt{3}: 1$
Option 4: $3: 1$
Correct Answer: $1: \sqrt{3}$
Solution : In $\triangle ACE$, $\frac{AC}{CE} = \tan 30^{\circ}$ ⇒ $\frac{AC}{CE} = \frac{1}{\sqrt3}$ ⇒ $CE = \sqrt3 AC$ -------------(i) In $\triangle BDE$, $\frac{BD}{ED} = \tan 45^{\circ}$ ⇒ $\frac{BD}{ED} = 1$ ⇒ $ED = BD$ -------------(ii) Since CE = ED, ⇒ $\sqrt 3 AC = BD$ ⇒ $\frac{AC}{BD} = \frac{1}{\sqrt3}$ So, the ratio of heights = $1: \sqrt3$ Hence, the correct answer is $1: \sqrt3$.
Question : The marked price of an article is 40% more than its cost price. If a 10% discount is given, what is the profit percentage?
Option 1: 10%
Option 2: 20%
Option 3: 26%
Option 4: 32%
Correct Answer: 26%
Solution : Given: The marked price of an article is 40% more than its cost price. Let, the cost price be 100 units. So, the marked price is (100 + 40% of 100) = 100 + 40 = 140 units A discount of 10% on the marked price is given. Hence, selling price is $140×\frac{90}{100}=126$ units Profit = 126 – 100 = 26 units Profit percentage = $\frac{\text{Profit}}{\text{Cost price}}×100=\frac{26}{100}×100=26$% Hence, the correct answer is 26%.
Question : The mean of 9 observations is 16. When one more observation is included, the new mean becomes 17. What is the value of the 10th observation?
Option 1: 9
Option 2: 16
Option 3: 26
Option 4: 30
Correct Answer: 26
Solution : Given: The mean of 9 observations is 16. One more observation is included and the new mean after becomes 17. Tenth observation = sum of ten observations – sum of nine observations = (17 × 10) – (16 × 9) = 170 – 144 = 26 Hence, the correct answer is 26.
Question : Directions: When a number is added to its next number and another number that is four times its next number, the sum of these three numbers is 95. Find the number.
Option 1: 16
Option 2: 14
Option 3: 17
Option 4: 15
Correct Answer: 15
Solution : Let, the number be x According to the question – x + (x + 1) + 4(x + 1) = 95 By solving the above equation – 6x + 5 = 95 6x = 95 – 5 6x = 90 x = 90 ÷ 6 = 15
So, the number is 15. Hence, the fourth option is correct.
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