Explanation

Passive voice of "Someone has broken your pen" is formed as:

Object + has/have been + past participle + by + subject

So, "Your pen has been broken by someone" is grammatically correct.

Explanation

Factors of 4 = 1, 2, 4

Factors of 6 = 1, 2, 3, 6

Factors of 8 = 1, 2, 4, 8

Highest Common Factor (H.C.F) = 2 (common to all three numbers)

Explanation

Present perfect passive structure: has/have been + past participle

Active: I have written a story.

Passive: A story has been written by me.

Explanation

8.0560 has 5 significant figures: 8, 0, 5, 6, and the final 0 (after decimal) is also significant.

Trailing zeros after a decimal point are always significant.

Explanation

Kindness means مہربانی

Compassion means شفقت

Explanation

To find (-4a^2)^3:

(-4a^2)^3 = (-4)^3 * (a^2)^3

= -64 * a^(2*3)

= -64 * a^6

= -64a^6

Explanation

Fare for 34 km = Rs. 1190

Fare per km = 1190 / 34 = Rs. 35

Now, fare for 48 km:

Fare = 48 km * Rs. 35/km = Rs. 1680

Explanation

The subject is the doer of the action, and in this sentence, "the drummer" is performing the action of hurling.

Phrases like "After the final speech" and "at the crowd" are prepositional phrases.

Explanation

Mental retardation (now called intellectual disability) refers to below-average intellectual functioning with adaptive behavior challenges.

It must appear during the developmental period (before age 18).

Explanation

During the 1971 East Pakistan crisis, the Soviet Union supported India, while the United States supported West Pakistan (now Pakistan).

Their involvement reflected Cold War rivalries, making it an internationalized conflict.