Correct Answer: 23

Solution : Given :
A can complete work = 30 days
B can complete work = 45 days
C can complete work = 90 days
Total work =  LCM of 30, 45 and 90 = 90 units
Efficiency of A $=\frac{90}{30} = 3$ units
Efficiency of B

Correct Answer: Both Kolkata and Mumbai

Solution : The correct answer is both Kolkata and Mumbai.

Kolkata and Mumbai each have the principal offices for two railway zones. Eastern Railway and South Eastern Railway have their headquarters in Kolkata, while Central Railway and Western Railway have their headquarters in

Correct Answer: Switzerland

Solution : The correct option is Switzerland.

Switzerland has established provisions for referendums or popular votes. In a form of direct democracy known as the "popular veto", citizens can also influence legislation by submitting petitions.

Correct Answer: Claw

Solution : Given:
Cat : Paw :: Crow : ?

Like, the foot of a cat is called a paw.
Similarly, the foot of a crow is called a claw.

Hence, the fourth option is correct.

Correct Answer: 2080

Solution : Here, radius, $r$ = 21 cm
The curved surface area of a hemisphere $= 2\pi r^2=2×\frac{22}{7}×21^2=2772\ \text{cm}^2$
75% of the curved surface area $= 2772×\frac{75}{100}=2079\ \text{cm}^2$
If we round off it to the nearest tens, we get 2080 cm².
Hence, the correct answer

Correct Answer: 405

Solution :
Let the height of the mall be AB.
In $\triangle DEC$,
$\tan\theta = \frac{DE}{CE}$
⇒ $\tan\theta = \frac{20}{60}$
⇒ $\tan\theta = \frac{1}{3}$
In $\triangle ABC$,
$\tan\theta = \frac{AB}{BC}$
⇒ $\frac{1}{3} = \frac{AB}{1215}$
⇒ AB = 405 m
Hence, the correct answer is 405.

Correct Answer:

Solution : According to the question figure –
1. The circle is shifted one position in an anticlockwise direction.
2. The triangle is shifted in one position in an anticlockwise direction.
So, following the above pattern, the required figure will be as follows –

Therefore, the figure in

Correct Answer: butane and propane

Solution : The correct option is butane and propane.

Cooking gas typically refers to liquefied petroleum gas (LPG), which is a mixture of primarily two hydrocarbons: propane (C₃H₈) and butane (C₄H₁₀). These gases are commonly used

Correct Answer:

Solution : According to the given figures –
1. The number of small circles surrounding the small square is increased by one in each figure series as compared to the previous figure in an anticlockwise direction.
2. The position of small circles outside the sides of the square

Correct Answer: $64$

Solution : Given that $\mathrm{PQT}$ is an isosceles triangle with $\mathrm{QT = PQ}$, and $\mathrm{PQ= 4 PS}$.
The height of the triangle $\mathrm{PQT}$ is four times the height of the quadrilateral $\mathrm{PTRS}$.
The area of a triangle $=\frac{1}{2} \times \text{base} \times \text{height}$
The area of the triangle