Explanation

• Marwan I the fourth Umayyad caliph
• Founder of the Marwanid line
• Father: Al-Hakam ibn Abi al-As
• Mother: Amina bint Alqama
• Reign: 684–685 CE

Additional information 

•  Marwan II (Marwan ibn Muhammad), he was the son of Muhammad ibn Marwan 

Last updated question by NS on 2 MAY 2026

Explanation

• Brass is an alloy mainly made of copper and zinc.
• In air, there are various gases including oxygen, carbon dioxide, moisture, and traces of hydrogen sulphide (H₂S).
• The gas responsible for discoloration of brass is hydrogen sulphide.
• Hydrogen sulphide reacts with copper present in brass to form copper sulphide.
• This copper sulphide forms a dark layer, causing brass to lose its shine and colour (tarnishing).

Last updated question by NS on 2 MAY 2026

Explanation

• Tetraethyl lead is primarily used as an antiknock agent
• Octane booster in gasoline and aviation fuel.
•  It prevents "knocking" (premature ignition of petrol vapors) in motors.
• Highly toxic and easily absorbed through the skin, lungs, and gastrointestinal tract

Last updated question by NS on 2 MAY 2026

Explanation

• The 25th Shanghai Cooperation Organization (SCO) Summit
• It was the largest summit in SCO's history
• Fifth time that China hosted the meeting
• Date: 31 August to 1 September 2025
• Host country: Tianjin, China

Last updated question by NS on 2 MAY 2026

Explanation

• Tuberculosis (TB) is considered one of the oldest and longest-lasting infectious diseases affecting humans
• The disease has been found in Egyptian mummies from 2400 BC.
• Infection dating back roughly 500,000 years in human ancestors,
• Confirmed 9,000-year-old skeletal cases

Last updated question by NS on 2 MAY 2026

Explanation

This is a distance problem using the Pythagorean theorem.

A person moves:

• 80 km North
• 60 km West

These form a right triangle.

Distance from starting point:

d=  √(80^2 + 60^2)

=√(6400 + 3600)

= √(10000) 

= 100 km

Last updated question by NS on 2 MAY 2026

Explanation

• The term “Golden Triangle” was coined by Marshall Green in 1971
• Local Name: Sop Ruak. 
• Continent: Southeast Asia
• Region: Myanmar, Thailand, Laos
• Situated at the Ruak and Mekong rivers in Chiang Rai Province
• Large, mountainous region of approximately 200,000 km2 (77,000 sq mi)
• The largest opium-producing areas of the world since the 1950s.

Last updated question by NS on 2 MAY 2026

Explanation

حاجی بغلول اردو کے مشہور طنز و مزاح نگار اور ناول نگار ہے۔

 یہ کردار منشی سجاد حسین کے مشہور ناول "حاجی بغلول" میں مرکزی حیثیت رکھتا ہے

جو انیسویں صدی کے آخر میں لکھا گیا۔

Last updated question by NS on 2 MAY 2026

Explanation

جام کا سب سے عام اور مشہور مترادف پیالہ ہے

Last updated question by NS on 2 MAY 2026

Explanation

Assume originally:

• Bought 100 items for Rs.100
  So, Cost Price (CP) per item = Rs.1

Now buys 10% less:

• 10% less than 100 = 90 items
• Still spends Rs.100

So new CP per item:

CP= 100/90​

Now sells 10% more:

• 10% more than 100 = 110 items

Assume selling rate is Rs.1 per item.

So total Selling Price:

$$SP=110\times 1=110$$

Profit:

$$Profit=SP-CP=110-100=10$$

Profit percentage formula:

$$\text{Profit \%}=$$Profit/ Cost Price ​×100

Substitute values:

10/100​×100=10%

That approach looks tempting, but it ignores that buying fewer changes the cost per item. The correct combined effect is:

Profit %=(110/90​−1)×100

$(110/90-1)\times 100$

$$=left(frac{20}{90}right)times100$$$$=22.22$$

$$Last\; updated\; question\; by\; NS\; on\; 2\; MAY\; 2026$$