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Question : Hydrogen bomb is based on the principle of
Option 1: controlled fission reaction
Option 2: uncontrolled fission reaction
Option 3: controlled fusion reaction
Option 4: uncontrolled fusion reaction
Correct Answer: uncontrolled fusion reaction
Solution : The correct answer is uncontrolled fusion reaction.
The theory of uncontrolled nuclear fusion underpins a hydrogen bomb. The process by which the nuclei of two light atoms join to generate a new nucleus is known as nuclear fusion.
Question : A sum becomes Rs.15,500 in 7 years on simple interest at the rate of 30 percent per annum. What is the total interest for the 7 years?
Option 1: Rs. 12,200
Option 2: Rs. 1,47,000
Option 3: Rs. 10,500
Option 4: Rs. 11,500
Correct Answer: Rs. 10,500
Solution : Given, Sum= Rs. 15500 Rate of interest (r) = 30% per annum Time (t) = 7 years Let the principal be P. ⇒ [P + (simple interest)] = sum ⇒ [P + $\frac{\text{Prt}}{100}$] = sum ⇒ [P + $\frac{\text{P} × 30 × 7}{100}$] =
Question : The total cost of a dishwasher and a vacuum cleaner was INR 78,750. The vacuum cleaner was sold at a profit of 37% and the dishwasher at a loss of 23%. If the selling price was the same for both items, then the cost price of the cheaper item was:
Option 1: INR 51,375
Option 2: INR 29,375
Option 3: INR 30,750
Option 4: INR 28,335
Correct Answer: INR 28,335
Solution : Let the cost price of the dishwater and vacuum cleaner be INR $y$ and INR $x$, respectively. Total cost price of a dishwasher and a vacuum cleaner = INR 78,750 $x$ + $y$ = $78750$-------------------(i) Profit of vacuum cleaner = 37% of $x$ =
Question : Directions: A father is 5 times as old as his son. His son is 6 years old. After how many years, will the father be 4 times as old as his son?
Option 1: 5 years
Option 2: 6 years
Option 3: 4 years
Option 4: 2 years
Correct Answer: 2 years
Solution : Given: The present age of the son = 6 years The father's present age is five times the age of his son, ⇒ Father's present age = 6 × 5 = 30 years
Let's assume that after Y years, his father's age will be
Question : Directions: After interchanging the given two numbers (not digits) what will be the values of expression (I) and (II) respectively? 6 and 4 l. 10 × 6 – 30 ÷ 4 + 20 II. 8 – 4 × 5 + 6 ÷ 2
Option 1: 12 and –6
Option 2: 20 and 55
Option 3: 55 and –20
Option 4: 10 and –6
Correct Answer: 55 and –20
Solution : Given: l. 10 × 6 – 30 ÷ 4 + 20 II. 8 – 4 × 5 + 6 ÷ 2
Let's solve each equation after interchanging the numbers according to the instructions. On interchanging the numbers 6 and 4 in the first
Question : $x$ does $\frac{1}{4}$ of a job in 6 days. $y$ completes the rest of the job in 12 days. Then $x$ and $y$ could complete the job together in:
Option 1: $9$ days
Option 2: $9\frac{3}{5}$ days
Option 3: $8\frac{1}{8}$ days
Option 4: $7\frac{1}{3}$ days
Correct Answer: $9\frac{3}{5}$ days
Solution : Time taken by $x$ to complete $\frac{1}{4}$ of a job = 6 days Time taken by $x$ to complete whole work = 6 × 4 = 24 days Part of work done by $x$ in a day = $\frac{1}{24}$ Time taken by $y$ to
Question : Directions: In the question, a part of the sentence is in bold. Below are given alternatives to the bold part at (1), (2), and (3) that may improve the sentence. Choose the correct alternative. In case no improvement is needed, your answer is (4).
The work you have submitted is not to the mark.
(1) as the
(2) from the
(3) up to the mark
(4) No Improvement
Option 1: (1)
Option 2: (2)
Option 3: (3)
Option 4: (4)
Correct Answer: (3)
Solution : The sentence can be improved using the third option.
This is the correct phrase in English to convey that something meets the expected standard or is satisfactory. "The work you have submitted is not up to the mark", indicates that the work does
Question : Select the most appropriate ANTONYM of the word "established" from the given sentence: Siben feels great satisfaction and gratified when he finds his pupils established successfully in the society when a lot have been displaced because of several failed attempts.
Option 1: displaced
Option 2: fail
Option 3: gratified
Option 4: pupils
Correct Answer: displaced
Solution : The right option is the first option.
Established implies being settled, well-founded, or having achieved success, while displaced means being removed, unsettled, or forced to leave a place, which is its antonym in this context.
So, the meanings of the other given words are:
Question : Directions: Select the option related to the fifth letter cluster in the same way as the second letter cluster is related to the first letter cluster and the fourth letter cluster is related to the third letter cluster. CAM : EES :: OAT : QEZ :: TOI : ?
Option 1: USO
Option 2: VTO
Option 3: VSO
Option 4: VSP
Correct Answer: VSO
Solution : Given: CAM : EES :: OAT : QEZ :: TOI : ?
Add the consecutive even numbers to the place value of the letters of CAM and OAT to get the related letter clusters. CAM→C + 2 = E; A + 4 = E; M
Question : In $\triangle$PQR, the angle bisector of $\angle$P intersects QR at M. If PQ = PR, then what is the value of $\angle$PMQ?
Option 1: 75°
Option 2: 80°
Option 3: 70°
Option 4: 90°
Correct Answer: 90°
Solution : In $\triangle$PQR, PQ = PR ⇒ $\angle$Q = $\angle$R = b PM is the angle bisector of $\angle$P. $\angle$QPM = $\angle$RPM = a Apply angle sum property in $\triangle$PQR, ⇒ $\angle$P + $\angle$Q + $\angle$R = 180° ⇒ $\angle$P + b + b = 180°
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