Correct Answer: (4)

Solution : The correct choice is the fourth option.

Explanation: The verb "forbid" is followed by the infinitive "to use" to indicate that the teacher prohibited the action of using a mobile phone in the class. The original sentence is grammatically correct and needs no improvement.

Correct Answer: $2.5$

Solution : $5 \sqrt{3} \cos 60^{\circ} \tan 30^{\circ}-3 \cos 0^{\circ}+3 \cos ^2 45^{\circ}+2 \sin ^2 60^{\circ}$
$= 5 \sqrt{3} \times \frac{1}{2} \times\frac{1}{\sqrt3}-3 \times1+3 \times \frac{1}{(\sqrt2)^2}+2(\frac{\sqrt3}{2})^2$
$= \frac{5}{2} -3+\frac{3}{2} + \frac{3}{2}$
$= \frac{5-6+3+3}{2}$
$= \frac{5}{2}$
$= 2.5$
Hence, the correct answer is $2.5$.

Correct Answer: SIONOEXPL

Solution : Given:
NUMERICAL is written as ICALRNUME and SCATTERED is written as EREDTSCAT.

The last four letters become the first four letters and the first four letters become the last four letters and the middle letter is a constant of NUMERICAL, to obtain the required code

Correct Answer: Frequently

Solution : The correct answer is the third option.

Frequently means happening often or regularly, which contrasts with the infrequent nature of seldom.

The meanings of the other options are as follows:

• Hardly means barely or scarcely; often used to indicate that something happens only to

Correct Answer:

Solution : As per mirror image properties, closer things appear closer to the mirror in reflection.
According to the information provided, if the mirror is placed on the right side of the figure (on line AB), the right of the reflected image will appear as the left,

Correct Answer: INR 720

Solution : The bill is INR 50,000.
After a 40% flat discount, the new bill is for  $\frac{50000×60}{100}=30000$
After successive discounts of 36% and 4%, the new bill is for $\frac{50000×64×96}
{100×100}=30720$
The difference is (30720 – 30000) = INR 720
Hence, the correct answer is

Correct Answer: Alfred Werner

Solution : The correct option is Alfred Werner.

The first person to comprehend the molecular structures of inorganic substances, especially coordination compounds, was the Swiss chemist Alfred Werner in 1893. His groundbreaking work in coordination chemistry led to his proposal of the coordination theory, earning

Correct Answer: 15 : 16

Solution : Given:
A : B = $\frac{1}{2}:\frac{1}{3}$
⇒ A : B = 3 : 2
B : C = $\frac{1}{5}:\frac{1}{3}$
⇒ B : C = 3 : 5
A : B = 3 : 2 is multiplied by 3 and B : C =

Correct Answer: 36

Solution : Given,
A boat can go 5 km upstream and 7$\frac{1}2{}$ downstream in 45 minutes.
It can go 5 km downstream and 2.5 km upstream in 25 minutes.
We know,
Time = $\frac{\text{Distance}}{\text{Speed}}$
Let the speed of the boat upstream be U and the speed of

Correct Answer: Cathy Freeman

Solution : Correct Answer is Cathy Freeman

Former Australian sprinter Cathy Freeman excelled in the 400-meter race. At the Summer Olympics of 2000, where she lit the Olympic Flame, she won the gold medal for the women's 400 meter race. At the age of 16, in