Explanation

Subject Identification:

"They" is the subject of the sentence, as it performs the action (knew).

"Both" is an adjective modifying "they," emphasizing the duo.

The subject is who/what the sentence is about.

Here, "they" (the duo) knew each other.

Explanation

The correct sentence should be:

"The old headmaster was walking along the road when he fell down."

Preposition Error:

"Below" means underneath (e.g., "below the surface"), which doesn’t fit the context.

"Along" is correct here, meaning moving in a line next to the road.

Explanation

Paint is a basic graphic program in Windows used for image editing and drawing.

It allows users to create, modify, and save images in different formats.

Explanation

To check if a number is exactly divisible by 4, we can check if the last two digits form a number that is divisible by 4.

2000: Last two digits are 00, which is divisible by 4.

Since 2000 ends in 00, it is exactly divisible by 4.

Explanation

Explanation

The Insert tab in MS Excel contains options to create charts, tables, pivot tables, etc.

It allows users to visualize data in various chart formats like bar, pie, line, and more.

Explanation

Noise means loud or disturbing sound.

Quiet means absence of noise or silence.

Noise means تیز یا پریشان کن آواز

Quiet means means شور یا خاموشی کی عدم موجودگی

Explanation

Given:

a = 2

b = 3

c = 1

Let's calculate the expression:

a² + 3c + 4ab²

= (2)² + 3(1) + 4(2)(3)²

= 4 + 3 + 4(2)(9)

= 4 + 3 + 72

= 79

Explanation

اقریٰ عربی زبان کا لفظ ہے، جو "قریہ" (گاؤں) کی جمع ہے۔

قریہ کا مطلب ہے چھوٹی بستی یا گاؤں، اور اس کی جمع اقریٰ استعمال ہوتی ہے۔

Explanation

"Into" is used to show a transformation: ground into powder.

"From" indicates the source: chocolate is made from (the powder).