Explanation

3x - 15 - 6 = 0

3x = 21

X = 21/3

X = 7

Explanation

According to Article 251 of the Constitution of Pakistan, Urdu is declared as the national language of Pakistan.

This article emphasizes the importance of promoting and developing Urdu as the lingua franca of the country.

It also allowing provincial languages to be used at the provincial level.

Explanation

Angela Merkel served as German Chancellor from November 2005 to December 2021.

Merkel served as head of Germany for 16 years. 

Merkel served is the first woman chancellor in the history of Germany.

Explanation

Explanation

A rain gauge is a meteorological instrument to measure the precipitating rain in a given amount of time per unit area.

The instrument consists of a collection container that is placed in an open area.

Explanation

The original statement is a direct quote, whereas the correct answer is a reported speech, which is a more polite and formal way of expressing the same sentence.

In reported speech, we change the sentence structure to:

"She asked him + question word + subject + verb"

So, the direct quote:

"Is it not your duty to help me in my old age?"

Becomes:

"She asked him if it was not his duty to help her in her old age."

Explanation

Men days

60 : 40

40 : x           

60/40= x/40,     40x= 60* 40

x= 40*60/40,      x= 60

Explanation

Mackenzie River, Nelson River, and Fraser River - flow in Canada.

Mackenzie River: Located in the Northwest Territories, it's the longest river in Canada and flows into the Arctic Ocean.

Nelson River: Located in Manitoba, it flows into Hudson Bay.

Fraser River: Located in British Columbia, it flows into the Pacific Ocean.

Explanation

A Logical Unit is also known as an Arithmetic Logic Unit (ALU).

It is a digital circuit that performs arithmetic and logical operations on binary numbers, such as:

• Arithmetic operations (e.g., addition, subtraction, multiplication, division)
• Logical operations (e.g., AND, OR, NOT, XOR)

Explanation

Number of tiles on one side of the room = 21 tiles.

Total tiles = B21×4= 84.

Since 4 tiles at each corner are shared by both rows, subtract these: 84−4= 80 tiles.