Explanation

The historical Greenwich meridian passes through :

• England
• France
• Spain in Europe,
• Algeria
• Mali
• Burkina Faso
• Togo
• Ghana in Africa,
• Antarctica at the South Pole.

Greenwich is an area in south-east London, England

It lies on the south bank of the River Thames in the historic county of Kent.

It is famous for the Prime Meridian (0° longitude).

It is used as the reference for Greenwich Mean Time (GMT).

Greenwich is famous for calculating the time for all countries.

Explanation

Harriet Tubman (c. 1822 - 1913) was an American abolitionist, political activist, and former slave.

She escaped to freedom in the North and worked tirelessly to help hundreds of enslaved African Americans escape through the Underground Railroad.

Born into slavery in Maryland, USA, she dedicated her life to fighting against slavery and advocating for women's suffrage.

Explanation

We know that the difference of their squares is 84, so we can write the equation:

(x+2)^2 - x^2 = 84

Expanding the equation, we get:

x^2 + 4x + 4 - x^2 = 84

Simplifying the equation, we get:

4x + 4 = 84

Subtracting 4 from both sides, we get:

4x = 80

Dividing both sides by 4, we get:

x = 20

So, the two consecutive even numbers are 20 and 22.

The sum of these numbers is:

20 + 22 = 42

Explanation

Profit = 25 rupees

Selling Price = 250 rupees

To find the percentage of profit, divide the profit by the selling price (not the cost price):

Percentage of Profit = (Profit ÷ Selling Price) × 100

= (25 ÷ 250) × 100

= 10%

So, Ahmed got a 10% profit on each article.

Explanation

"Reflection" is a noun as it refers to the image of something seen in a mirror or water.

It names the action or result of reflecting.

Explanation

A custom is a tax imposed on goods that are imported into or exported out of a country.

This tax is primarily used to regulate trade, protect domestic industries, and generate revenue for the government.

Explanation

Nelson Mandela International Day is an annual international day in honour of Nelson Mandela, celebrated each year on 18 July, Mandela's birthday.

The day was officially declared by the United Nations in November 2009, with the first UN Mandela Day held on 18 July 2010. 

Explanation

To find the average (arithmetic mean) of a and b, we need to first solve for a and b.

Given equation: 10a + 10b = 35

Divide both sides by 10: a + b = 3.5

Since we want to find the average of a and b, we can use the fact that the average of two numbers is equal to their sum divided by 2.

So, (a + b)/2 = 3.5/2

= 1.75

Therefore, the average (arithmetic mean) of a and b is 1.75.

Explanation

Taqreer refers to the Holy Prophet's (SAW) silent approval or consent to a statement or action.

Hadith is the Saying (قول), Action (عمل), and Taqrer (تقرير)  of Prophet Mohammad (SAW).

There are three types of Ahaddis:

1. Saying
2. Action
3. Taqreer

Explanation

At'tibri is the author of "Tarikh-ul-Rusul wal-Al-Muluk."

This work is also known as "The History of the Prophets and Kings".

It is a significant historical chronicle of early Islamic history.