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Question : The average age of Ram and Shyam is 28 years. If Rahim replaces Ram, then the average age will become 26 years. If Rahim replaces Shyam, then the average age will become 30 years. What are the respective ages of Ram, Shyam, and Rahim?
Option 1: 32 years, 24 years, and 28 years
Option 2: 34 years, 40 years, and 30 years
Option 3: 48 years, 40 years, and 26 years
Option 4: 38 years, 44 years, and 36 years
Correct Answer: 32 years, 24 years, and 28 years
Solution : Average of Ram's and Shyam's age = 28 ⇒ $\text{Ram + Shyam}=28\times2=56$ Average of Rahim's and Shyam's age = 26 ⇒ $\text{Rahim + Shyam}=26\times2=52$ Average of Ram's and Rahim's age = 30 ⇒ $\text{Ram + Rahim}=30\times2=60$ The sum of
Question : If solution A contains 10% acid and solution B contains 30% acid, what ratio of solution A to solution B should be mixed to obtain a mixture with 25% acid?
Option 1: 1 : 2
Option 2: 3 : 1
Option 3: 1 : 3
Option 4: 2 : 1
Correct Answer: 1 : 3
Solution : Given: A contains 10% acid, solution B contains 30% acid and the mixture contains 25% acid. Using the rule of alligation, we get, So, the required ratio = 5 : 15 = 1 : 3 Hence, the correct answer is 1 : 3.
Question : The body of the ______ is circular in cross-section; hence, the name roundworms. They may be free-living, aquatic, terrestrial, or parasitic on plants and animals.
Option 1: Platyhelminthes
Option 2: Ctenophores
Option 3: Mollusca
Option 4: Aschelminthes
Correct Answer: Aschelminthes
Solution : The correct answer is Aschelminthes.
Another name used for roundworms is Aschelminthes. This may be free-living, or parasitic. This means they are found in nature alone or may also be present in the bodies of other organisms. One distinguished characteristic of this organism is the
Question :
Taxonomy is a science that deals with:
Option 1:
Morphology
Option 2:
Anatomy
Option 3: Classification
Option 4: Economic uses
Correct Answer: Classification
Solution : The correct option is Classification.
The science of classifying organisms is known as taxonomy. It is a vast discipline that includes organism identification, description, naming, and classification. Taxonomy is founded on the idea that all organisms are linked to one another and may be classified
Question : What is an Azolla?
Option 1: Fern
Option 2: Algae
Option 3: Fungi
Option 4: Bryophytes
Correct Answer: Fern
Solution : The correct answer is Fern.
Azolla is a genus of seven species of aquatic ferns in the Salviniaceae family, which includes mosquito fern, duckweed fern, fairy moss and water fern. Their structure is highly specialised and reduced. They resemble certain mosses or duckweed rather than
Question : Directions: Based on the alphabetical order, three of the following four are alike in a certain way and thus form a group. Which is the one that does NOT belong to that group?
Option 1: RPT
Option 2: YWA
Option 3: FDH
Option 4: EJN
Correct Answer: EJN
Solution : Let's check the options – First option: RPT→R – 2 = P; P + 4 = T Second option: YWA→Y – 2 = W; W + 4 = A Third option: FDH→F – 2 = D; D + 4 = H Fourth option: EJN→E +
Question : Directions: Which of the following cubes in the answer figure cannot be made based on the unfolded cube in the question figure?
Option 3:
Option 4:
Correct Answer:
Solution : Properties of a dice – 1. Opposite faces of a dice cannot appear or hide together. 2. Sides of the opposite faces of a dice cannot touch each other. Rules to find out the opposite faces of a dice when two or more positions of the
Question : Select the most appropriate idiom for the following sentence.
The government arrested the opposition leader, making the situation worse.
Option 1: To cast pearls before swine
Option 2: To be on the last leg
Option 3: To add fuel to the fire
Option 4: To bite the dust
Correct Answer: To add fuel to the fire
Solution : The correct choice is the third option.
To add fuel to the fire means to make the situation worse or miserable.
The meanings of the other options are as follows:
Question : An aeroplane covers a certain distance at a speed of 400 km/hr in 8 hours. To cover the same distance in 5 hours, the speed of the aeroplane will be:
Option 1: 640 km/hr
Option 2: 680 km/hr
Option 3: 580 km/hr
Option 4: 600 km/hr
Correct Answer: 640 km/hr
Solution : Given: An aeroplane covers a certain distance at a speed of 400 km/hr in 8 hours. Here, distance = (400 × 8) km, time = 5 hours So, the required speed = $\frac{\text{distance}}{\text{time}}$ = $\frac{400×8}{5}$ = 640 km/hr Hence, the correct answer is 640
Question : In the plant kingdom, "Ferns and Fern allies" belong to which group?
Option 1: Bryophyta
Option 2: Gymnosperms
Option 3: Thallophyta
Option 4: Pteridophyta
Correct Answer: Pteridophyta
Solution : The correct answer is Pteridophyta.
In the plant kingdom, there are different types of plants with distinct characteristics and ways of reproduction. Ferns and Fern allies are part of a group called Pteridophyta. This group comprises plants that reproduce through spores and not seeds.
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