Explanation

• The first-ever IBM PC-compatible computer virus, named "Brain'
• It is also known as Pakistani Brain or Lahore
• Developed in January 1986
• By two brothers, Basit Farooq Alvi and Amjad Farooq Alvi,

Last updated by NA on 06-11-2026

Explanation

Water molecules are held together by hydrogen bonds,

It is a type of strong intermolecular force

Where the slightly positive hydrogen of one molecule attracts the slightly negative oxygen of another, creating a "sticky" network that gives water unique properties like surface tension.

Explanation

• Whales are marine mammals (Mammalia).
• It belonging to the order Cetacea.
• This also includes dolphins and porpoises.
• They breathe air, give birth to live young, and produce milk to feed their offspring, like all mammals.

Last verified on 06-11-2026

Explanation

• Soy sauce is produced by the fermentation of soybeans.
• Microorganisms like Aspergillus oryzae or Aspergillus sojae are used in the process.
• It is widely used as a flavoring condiment in Asian cuisine.

Additional information:

Other Ingredients in Soy Sauce (5):

1. Wheat (for flavor)
2. Salt
3. Water
4. Lactic acid bacteria
5. Yeast

Types of Soy Sauce: Light, Dark, Tamari

Last verified on 19-01-2026

Explanation

Albert Einstein 

- Profession: Theoretical physicist.

- Century: One of the most influential physicists of the 20th century.

- 1905: Published four landmark scientific papers.

- Nobel Prize: Awarded for his explanation of the photoelectric effect, not the Special Theory of Relativity.

Explanation

• The Holy Prophet Muhammad (ﷺ) performed only one Hajj in his lifetime.
• He performed this Hajj in 10 A.H. (632 CE).
• It was his first and last Hajj.
• It was known as Hujjat-ul-Wada (The Farewell Pilgrimage).

Additional information:

• The Holy Prophet (ﷺ) performed 4 Umrahs in his lifetime.
• His first Umrah after the Hijrah to Madinah was performed in 7 A.H. (629 CE) (Umrah al-Qada).

Last updated by NA on 05-11-2026

Explanation

There have been only 7 nationwide censuses.

1. First Census was held in Pakistan in 1951.
2. The second Census was held in Pakistan in 1961.
3. The third Census was held in Pakistan in 1972.
4. The fourth Census was held in Pakistan in 1981.
5. The fifth Census was held in Pakistan in 1998.
6. The Sixth Census was held in Pakistan in 2017.
7. The seventh census was held in Pakistan in 2023.

Additional Information:

Census has been undertaken every 10 years

it was beginning in 1872 under British viceroy Lord Mayo

Explanation

• Pakistan's last census, the 7th Population & Housing Census, was indeed held in 2023  
• From March to May 2023
• Recorded Pakistan's population at 241.5 million (approx.)
• Pakistan's Constitution requires a census every 10 years.

There are a total of seven censuses held in Pakistan

1951 (First census)

1961 (Second census)

1972 (Third census)

1981 (Fourth census)

1998 (Fifth census)

2017 (Sixth census)

2023 (Seventh, first digital census) 

Next 2033

 Last updated by NA on 05-11-2026

Explanation

• - Location: Cape Peninsula, Western Cape, South Africa.
• - Coast: Atlantic Ocean.
• - Geographical Feature: Rocky headland.
• - Pharaoh: Necho II of Egypt.
• - Date: Around 600 BC.
• - Explorers: Phoenician sailors.
• - Route: Red Sea → Around Africa → Mouth of the Nile

Last updated by NA on 05-11-2026

Explanation

• Windows + D shows or hides the desktop.
• It minimizes all open windows to display the desktop.
• Pressing Windows + D again restores the previously open windows.

Additional information:

• Windows + E: Opens File Explorer.
• Windows + M: Minimizes all windows.

Last updated by NA on 05-11-2026