Explanation

• Artist: Leonardo da Vinci (1452–1519)
• Painting Period: 1503–1519
• Origin: Italy
• Current Location: Louvre Museum, Paris, France
• Famous Features: Mysterious smile, sfumato technique, widely copied and recognized globally

Last verified on 18-01-2026

Explanation

• The empirical formula of water is H₂O

• Freezing point: 0°C (32°F)
• Boiling point: 100°C
• Molar mass: 18.015 g/mol
• Density: 997 kg/m³
• Melting point: 0°C

Last updated by NA on 25-April-2026

Explanation

Series:

6, 3, 12, 6, 24, ___

Step 1: Find a pattern

• 6 → 3 (÷2)
• 3 → 12 (×4)
• 12 → 6 (÷2)
• 6 → 24 (×4)

So the pattern alternates:
÷2, ×4, ÷2, ×4, ...

Step 2: Next term

$$24÷2=12$$

$$Last\; updated\; by\; NA\; on\; 25-April-2026$$

Explanation

• The Pacific Ocean is the largest and deepest ocean on Earth.
• It covers about 30% of the Earth's surface.
• It contains 97% of the Earth's water.
• The Mariana Trench, the deepest part of the ocean.
• It is located in the Pacific.
• The Arctic Ocean is connected to the Pacific Ocean via the Bering Strait.

Additional information:

• Oceans cover 71% of the Earth's surface.
• The Indian Ocean is the warmest, with the Persian Gulf being the hottest area.
• The Diamantina Trench is the deepest point in the Indian Ocean.
  
• Jordan does not have an ocean.
• The Arctic Ocean is the Smallest Ocean of the world.

Last verified on 17-03-2026

Explanation

• Quick Sort is a divide-and-conquer sorting algorithm.
• In the worst case, it occurs when the pivot divides the array very unevenly (e.g., always smallest or largest element).
• This results in O(n²) comparisons for an array of size n.

Additional information:

• Average case → O(n log n)
• Best case → O(n log n)
• Worst case → O(n²)

Last verified on 23-03-2026

Explanation

(1 - sinθ)(1 + sinθ) = 1 - sin²θ = cos²θ

Last verified on 10-03-2026

Explanation

144÷12=12

12×3=36

So,

144÷12×3=36

Explanation

• After the Martial Law of 1958, General Muhammad Ayub Khan introduced the Basic Democracy System in 1959.
  • It created a local government structure and an indirect electoral system in Pakistan.

Additional information:

• Total Basic Democrats: 80,000
• East Pakistan: 40,000
• West Pakistan: 40,000
• These 80,000 members formed the Electoral College to elect the President and Assemblies.

Last verified on 07-03-2026

Explanation

Mercury is used as a thermometric fluid

Because it has several ideal properties like:

• High Boiling Point (B.P)
• Low Freezing Point (not high M.P)
• Stable and Uniform Coefficient of Expansion
• Visibility and Non-wettability

Last updated on 06-March-2026

Explanation

• Asia is the largest continent by land area and population.
  • It covers about 44.58 million sq km.
  • Around 60% of the world’s population lives in Asia.
  • It has 40+ countries, including China, India, and Indonesia.
  • It makes up about 30% of Earth’s land area.

Last verified on 07-02-2026